300Blackout Vs 6.8


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samuelcmm
October 9, 2012, 09:40 PM
So I've searched around and I can't seem to find any direct comparative information on the two. So what are the BC coefficient both from 16'' barrel. What is the maximum efective range, Drop at 100,200......500 yards and which would YOU prefer if you were going to shoot 3 gun matches (eventually I will be able to get a suppressor however as Im starting full time college next semester I wont have the money) I guess ill have to convince my dad that he wants one :D. Thanks

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brian923
October 9, 2012, 10:19 PM
personaly would go with the 6.8 spc. I think its a better all around cartridge. it has bullets made specifically for the shorter round. these include hunting bullts made to expand at lower velocitys. was watching TACTV with Larry Vickers, and theh had the 300. blk on. it had roughly 14-16 inches of drop at 200 yards. its been awhile since I have looked over some 6.8 ballistics, but I think its less than that. the 300 just dosent have the case capacity with the .223 case. it would be a fun round inside 150 yards, but I think I would personally go 6.8. I had a 6.8 upper that would put 90 grainers in a 1/2 inch 5 shot group at 100. and 110 prohunters in 3/4 inches with only a 1" drop in poi witb the 90's. I really regret selling that upper.

snakeman
October 9, 2012, 10:23 PM
the 6.8 is definitely a better, flatter shooting, harder hitting cartridge. However, blackout ammo is cheaper and you can use the bolt and mags from your 5.56 upper. I built a 6.8 and would do it over again if I had to choose between the two. I also like the 6x45 though and will build one of those in the near future.

bikemutt
October 9, 2012, 10:27 PM
I just put a real nice 300 blackout on layaway today so I can't say first hand. I have the blessing of my trusted 'smith who showed me some 100 yd targets that were outstanding. Ammo is plentiful here, if not cheap.

helotaxi
October 9, 2012, 10:28 PM
If I wanted to be competitive in 3-gun, I wouldn't shoot either. Too much recoil.

cfullgraf
October 9, 2012, 11:31 PM
It depends on what you want the rifle to do.

6.8 SPC has more long range potential while the 300 BLK will operate suppressed better.

The barrel is the only difference between a 300 BLK and 223 Remington AR so repair parts are very available.

300 BLK uses standard 223 Rem magazines. 300 BLK has a higher magazine capacity than the same size 6.8 SPC magazine.

I like my 300 BLK. A great 100 yard rifle. I have shot mine with 110 grain to 208 grain bullets. Got some 245 grain bullets to try.

I will admit that I have not tried a 6.8 SPC.

Z-Michigan
October 9, 2012, 11:42 PM
If I wanted to be competitive in 3-gun, I wouldn't shoot either. Too much recoil.

Yes, and also too much expense. Either one will cost you double or triple what you would pay to run a 5.56 gun, and a 5.56 has a flatter trajectory as well. Paper doesn't care what hits it, and steel usually doesn't unless there are issues with hearing the hit due to distance.

6.8 SPC has more long range potential while the 300 BLK will operate suppressed better.

This is it in a nutshell. Also 300BLK makes it much easier to send a heavier payload - 150-175gr supersonic is quite realistic with 300, while 120 is the heaviest common bullet for 6.8 (though SSA now has a 140gr load with an attractive BC).

ParChaser
October 10, 2012, 02:25 AM
OK, so I was thinking about going to a .300 Blackout in 9" for Hogs with the thought most of my shots would be under 200 Yards. I was watching Larry Vickers show last night, and it left me scratching my head and wondering if that is my next round. I have a LWRC 16" 6.8spc & a LWRC 16" SPR 5.56. I was leaning on the .300 BO till I watched TacTv last night where they did a 50, 100 & 200 yard test with the 5.56, .300BO & 7.62x39 on MGM Steel Sillouette 12x18"...
Results- 5.56 50, 100 & 200 yds tight group center mass.
Results-.300BO 50yds 4" low of Center, 100yds= 6" low, 200yds 14-16" low
Results- AK 50yds 1" Center, 100yds= 2-3" of Center, 200yds 14-16" low

Don't remember the Ammo used for each but this was a little disturbing since I was looking into the .300 BO for my next aquisition. Your thoughts????

justice06rr
October 10, 2012, 02:44 AM
Parchaser, thanks for showing that info. I have all 3 cartriges you mentioned: 5.56, 300BLK, and 7.62x39. Here's my take:

Its not surprising that 300Blackout and 7.62x39 have similar ballistics, although the 300BLK shot lower given the smaller case capacity. When you said you were thinking of going 9" on the 300Blackout for hogs, were you talking about a SBR/Pistol setup?

300Blackout is optimal for short ranges and with suppressor use. Depending on your range, under 150yards you should be ok but a 9-inch barrel would obviously be a bit different due to the shorter length. If you already have 5.56/223 and 6.8, the 300BLK is a good round to go with. Just understand its purpose and limitations. The 5.56 and 6.8 will be better for longer engagements, but for anything under 150yards the 300BLK should be a good round.

So in short, if you wanted to use the 300BLK for hogs it would be better to stick with a 16" barrel so you get better performance out of it. Remember that 300Blackout is designed really both for suppressed/unsuppressed use out of the same AR15 parts save the barrel. Its also more suited for CQB type situations, so knowing that, make your decision.

You already have 5.56 and 6.8 so those would probably be better for hunting at farther distances over 200yards.

-------------

Samuelcmm, depending on what type of 3-gun you plan to do, either 6.8 or 300BLK should be ok although the 6.8 will have the advantage if you have long distance rifle stages over 200yards. Anything less than that and the 300BLK should work well.

Do you already have a 5.56/223 AR? If not I would highly suggest the 300Blackout for the purposes of better interchangeability with AR15 parts. If you already have a 5.56/223 then obviously 6.8 might be better, but only slightly.

I personally love my 300Blackout AR :D . But for all-around multi-purpose use, you can't beat the ol' 5.56/223

Girodin
October 10, 2012, 02:51 AM
So in short, if you wanted to use the 300BLK for hogs it would be better to stick with a 16" barrel so you get better performance out of it.

If the 300 BLK is like 7.62x39 you lose little velocity going to a 9" barrel.

David E
October 10, 2012, 03:00 AM
Results-.300BO 50yds 4" low of Center, 100yds= 6" low, 200yds 14-16" low

Your thoughts????

Not seen the show yet, but it's on the DVR.

But it seems to me that if the BO had a 2" high zero at 100, then the 200 target would have hits 6"- 8" low. As it is, it sounds like its sighted in at 10 yds.

justice06rr
October 10, 2012, 05:50 AM
If the 300 BLK is like 7.62x39 you lose little velocity going to a 9" barrel.


I don't know the actual numbers in velocity difference, but I would think a barrel length difference of 7" would have a significant decrease in the velocity of the bullet (from 9" barrel to a 16"). That's almost losing half of the barrel...

I could be wrong though. Do you have any figures to prove that the x39 cartridge will not lose that much velocity with a much shorter barrel? Remember that 300BLK is slightly different and less powerful than x39. I think the similarities are more with 16inch barrels. When you change barrel lengths and shorten the 300BLK barrel, the difference in velocity is amplified.

cfullgraf
October 10, 2012, 07:56 AM
Results-.300BO 50yds 4" low of Center, 100yds= 6" low, 200yds 14-16" low


Your thoughts????

Shooting low at 50 or 100 yards is just a sighting issue. Look at the relative difference.

My 300 BLK loads with 125 grain bullets run about 2100-2200 fps, 155 grain bullets run about 1700 fps, and 208 grain bullets run about 1100 fps.

At 100 yards, the 208 grain loads hit 8 to 10 inches below the 125 grain loads at 100 yards. Quite the rainbow trajectory.

The 125 grain loads shoot fairly flat out to 100 yards, within the 2 inch difference noted on the television show.

300 BLK was designed to be ballistically similar to 7.62x39 in an AR platform. Also, 300 BLK was designed for suppressed capabilities.

I got my 300 BLK for a home/farm defense rifle. It is great for that in my opinion.

samuelcmm
October 10, 2012, 09:05 AM
I do have a 223. I was looking for something new to add to my collection and these cartridges stood out to me. One more that a freind mentioned to me last night that i had forgoten about is the 30 remington ar so are there any thoughts on it. I would be reloading Also i forgot to mention that at first

68wj
October 10, 2012, 10:31 AM
I will start my response with this photo:
http://68forums.com/forums/attachment.php?attachmentid=7218&d=1347247377

That is 3/8" mild steel that a father and son shot at 100 yards in September. Both were shooting 115 gr HP ammo. The 3 complete holes are the only attempts made by the 6.8, while the rest are the 300 BO. Since I don't have an appetite for steel, this doesn't exactly mean anything about performance on game, but is a nice comparison.

Directly responding to your questions, let me see where I can help:
So what are the BC coefficient both from 16'' barrel. It depends, what bullet? The 6.8 has factory loads from 85-140gr, and the BO is 110-225.

What is the maximum effective range On what? Coyote, deer, paper, etc? If hunting game you need to run the numbers of your chosen load for energy on target (ft.lbs) and velocity (to make sure the bullet expands and transmits that energy). If hunting paper, it is more a matter of knowing your gun and aiming accordingly.

which would YOU prefer if you were going to shoot 3 gun matches For paper killing games, .223.

You can suppress either cartridge too, but if you want to start running subs then the 300 BO makes more sense. This is something the 300 Whisper guys have been saying and working on for years, but it took a name change and SAAMI submission to get the larger industry to listen.

There is pretty good availability of both right now with some broad industry and cottage manufacturers. I would image that even more will exist next year. Not sure about who is working on anything for the BO, but Tula and Federal are both saying they should have something on the shelf in 2013.

In the end, especially if you are reaching into the paterfamilias pocket, get both. :evil:

Walkalong
October 10, 2012, 11:34 AM
Bullet drop is worried about way too much. As long as you know the ballistics of your caliber, you are good to go.

Recoil of the .300 BLK is a little better to me than .223. I guess it is subjective.

I bought 500 bullets for 6.8 when they were on sale, because I thought I was going to build/buy one.

Then the .300 BLK came along with all it's benefits of cheap cases, the ability to shoot the cheaper 147 Gr pulled bullets available, no change to any AR part except the chamber, uses the same mags, soft (to me) recoil, etc. So I built a .300 and am very happy with it. The 155 Gr A-Max shoots well in mine at around 1775 FPS, and the cheap 147 Gr pulled bullets are great for plinking running around 1850 FPS.

Wanna trade for some 6.8 projectiles? :)

brian923
October 10, 2012, 02:43 PM
the cool thing with the 300 is the wide range of bullet selection. i guess if you use the 110 vmax or similar, you would have a good 200 yard coyote/pig gun. I might get one of these soon, just to play around with. I have. 308win, and a 30/06, and plenty of 223 brass. so it just might be in the cards... does anyone have any ballistic info for the 110 vmax in the 300blk?

Girodin
October 10, 2012, 04:40 PM
I don't know the actual numbers in velocity difference, but I would think a barrel length difference of 7" would have a significant decrease in the velocity of the bullet (from 9" barrel to a 16"). That's almost losing half of the barrel...

I could be wrong though. Do you have any figures to prove that the x39 cartridge will not lose that much velocity with a much shorter barrel?

My experience is that going from a 16" gun to an 11" gun I went from around 2300 to around 2100. That is, one string of one load, over one chronograph from only two guns though. I've seen others report similarly that they loose 150-200 FPS. Two hundred feet per second for a gun that is mostly an inside of 200 yards (300 max) gun is not a big deal to me. I've seen at least one 7.5" gun that was shooting at around 1900 FPS where a 11" gun was doing 2000-2100.

I have no idea about a blackout. With a 7.62x39 there is nothing I would shoot with a 16" gun that suddenly I would feel uncomfortable using a 9-10" barreled gun for.

Bullet drop is worried about way too much. As long as you know the ballistics of your caliber, you are good to go.

I think this is largely true, given that you also know your zero, etc. For me its more an issue of drift. The more something drifts the more my errors in reading wind throw things off. I'm not great at reading wind. For people who can read wind better than I can this may not be as much of a concern. The same is true to an extent for judging range. At times I can use a range finder but other times I may not be able to. With a 5.56 for example I can use a 300 yard zero and have a 5" zone from 25 yards to 300. I'm still on a torso at 400. It nice to be able to put the sights on target and not have to worry if its 350 yards and not the 250 yards I'm estimating.

But yes, to the extent I know, or can accurately measure distance, and to the extent I know my loads, and my zero and adjustments, bullet drop is just math and can be accounted for.

Walkalong
October 10, 2012, 06:08 PM
does anyone have any ballistic info for the 110 vmax in the 300blk?I have shot them at 2200+ FPS, and could probably get 2300 with a slower powder. That would be a little flatter shooting than the 147 to 155 Gr bullets. Data is sketchy for the .300 BLK. There is not a lot out there yet. PM me and I will share the load. Naturally you will need to start low, work up, and use at your own risk.

snakeman
October 10, 2012, 06:27 PM
Here's how I would rate these cartridges in relation to hunting.

1. 6.8 spc: flat shooting hard hitting
2. 7.62x39: hard hitting
3. 300 black out hard hitting not as flat shooting as those above
4. 5.56 flat shooting, not enough horsepower for much other than small whitetails and small game

also, don't forsake the 6.5 grendel, although it's not as popular as the others it is a true performer. It has range, power, and low recoil. If it was more available when I built my 6.8 I would have probably built a grendel

helotaxi
October 10, 2012, 08:00 PM
One more that a freind mentioned to me last night that i had forgoten about is the 30 remington ar so are there any thoughts on it.No rifles available, no ammo available, no brass available. That about sums up that cartridge. The cartridge had huge potential, but was left to die by Remington. I'd like it to catch on just for wildcatting potential, but it probably isn't going to happen at this point. Everything about the upper is proprietary, BTW.

Coltdriver
October 10, 2012, 08:05 PM
300 BLK ballistics and 7.62 39 ballistics are virtually identical with the same bullet weight.

I had a 300 BLK upper I built. It is basically a 30 30 that will launch bullets subsonic well.

300 BLK is a neat round, but nothing all that special. If you reload it is miserly with the powder.

I am not familiar with the 6.8 but the 300 BLK is just not that great.

oldpapps
October 10, 2012, 10:19 PM
"samuelcmm

300Blackout Vs 6.8
So I've searched around and I can't seem to find any direct comparative information on the two. So what are the BC coefficient both from 16'' barrel. What is the maximum efective range, Drop at 100,200......500 yards and which would YOU prefer if you were going to shoot 3 gun matches (eventually I will be able to get a suppressor however as Im starting full time college next semester I wont have the money) I guess ill have to convince my dad that he wants one . Thanks"

I can only give you what I have worked up with the 300 BlackOut and 'just another opinion' regarding the 6.8 SPC.
First the 6.8 SPC - My opinion is that it looks like a very good longer range flat shooting hunting round for use in the AR.
And now for the 300 BlackOut - Again my opinion. Much better choice for sub-sonic loading.

To the loads. First, I don't load hot, I don't do SBR or suppressed. These are my 'standardized' loadings:

300 V-Max 110 630 17.2 2328 DSA 10/9/2012 2.010in

300 M2 GI 147 H110 16.6 1945 DSA 5/8/2012 2.065in

300 M2 GI 147 LtGun 15 1870 DSA 9/22/2012 2.160in

300 InterBond 150 H110 16.6 1908 DSA 10/9/2012 2.069in

16 inch DSA barrel with carbine gas system and buffer. Velocities are at 10 feet and the average of not less than 10 rounds, most are many more. All of these loads do well, accuracy wise, at 100 yards, for me. These loading fully function my M4 type rifle. Changes in the OAL seems to make larger changes in velocities and (I use GI mags) longer OAL reportedly may cause or add to fail to feed problems. I seat case mouth to the ogdive curve or canalure groove and have yet to have any feeding issues.

I hope this helps a little. And 'These loads and loading data are for informational data only. With other components and loading processes may not be safe in your weapon.'

snakeman
October 10, 2012, 10:20 PM
It is not basically a 30-30. neither is the 7.62x39. compare the cartridges on velocity and bullet weight first, load it with flextips and the 30-30 dominates the others.

samuelcmm
October 11, 2012, 12:10 AM
Snakeman thankyou for mentioning the 6.5 grendel I didn't know much about it but the last four hours of reading off this screen has just about got me completely sold on it (minus the price of rifles) Thanks everyone for the posted information I have more or less ruled out that i will get a 300BO (for now) but my intrest in the 6.5 grendel has peaked. I would like to use this rifle for hunting deer, hogs, coyotes, maybe mule deer my most likely the farthest shot i would take on such critters is 350 or so yards and from what i have read the grendel should be capable, so any last opinions? Oh and i will most likely be building this rifle so any good places to get a good price on grendel parts?

68wj
October 11, 2012, 06:41 AM
The 6.5 is a good round. I have heard it described best by a rifle builder that does both 6.5 and 6.8: If you mostly shoot long targets, with some hunting, use a 6.5. If you mostly hunt, with some target shooting, use a 6.8. Within game distances, the two cartridges are closer than their fan bases want to admit, with the 6.8 being better suited to shorter barrels and the 6.5 being ideal in full rifle length setups.

snakeman
October 11, 2012, 07:11 AM
If I were going to get a 6.5 grendel I would go to model1sales.com and get a 20" rifle. if you decide on the 6.8, dpms and stag arms would be good places to start,

Gtscotty
October 11, 2012, 07:45 AM
I went with the 6.8 spc over the 300 BLK for my dedicated AR hunting rifle, and I really believe the 6.8 is better suited for that role. The 6.8 is a faster, harder hitting round than the 300 blk in all bullet weights (or SD's) for which they are comparable. Even in the extreme upper end of factory 6.8 bullet weights, the 140 gr SSA load is still booking along at 2400 fps. While bullet drop can, of course, be accounted for, most people seem to prefer flatter shooting rounds that simplify the bullet drop memorization/calculations required for normal hunting distances.

The load I'm going to use for deer this year sends a 110gr Accubond out of the muzzle at 2660 fps, which should be about perfect for our small southern white tail.

I do think the 300 BLK is a fine caliber, and I will most assuredly be buying an upper when I get around to picking up a 30 cal can, its just the 6.8 is better suited to the hunting niche.

Looking back though, it looks like the OP intends to mostly use this AR for 3 gun competitions, if so, why are you even looking at the 6.8 and 300? The only round that really makes sense for AR shooting games is the .223.

p.s.~ If you decide to look at the 6.8, I would check out AR Performance and Bison Armory first, they are pretty much the go-to 6.8 makers.

EdLaver
October 11, 2012, 12:01 PM
I watched the TacTv episode as well. My 1st question, which I dont believe was answered, was what grain bullet was being used in the 300 blk out? I use the 115 grain Remington supersonic HP (cheap stuff) and it does not drop like what was shown on the show. I believe Vickers was using a heavier bullet. The 147 300 blk it what I believe may have been used. He (Vickers) did mention that the 300 is bullet specific and considering all the loads currently available, if it was used for 300 yards, the 115 grain will work. I'm getting 7"-9" drop at 300 yards using a 50 yard zero.

brian923
October 11, 2012, 03:11 PM
I would love it if they came out with reloading components for the 30AR. I would do a 6mm/30ar. I have also thought very hard about the 6.5 grendal as I am in the prosses of building a 6.5x55. Swede, and wod be able to buy bulk bullets for reloading... so many choices, not enough moola...

Dean1818
October 11, 2012, 08:40 PM
I looked at both.

I chose the 6.8

Better all around bullet performance was the deciding factor

For hunting Texas boar the Hornady 120 SST is devastating

There is an upside as a there will be some new low cost ammo coming in 2013


Its worth the time if you are serious about the decision to call Ben at Bison Armory (Where I purchased my 6.8) or "H" at AR Performance

Both are experts in the 6.8 field and are a wealth of knowledge

They both make fantastic rifles

Also do some research at 6.8forums.... Many people made the same choice there after looking at the options

samuelcmm
October 12, 2012, 10:47 PM
@68wj I spend more time at the range than I do hunting but I do a good bit of time hunting.

@Gtscotty While I really do wish to get well into 3 gun matches and I would use this rifle for them for a while really I want one that I can use to hunt, shoot competitions, and paper-punch without breaking the back to buy 2 rifles. I will eventually buy a better suited 223 upper for the primary purpose of matches.

@Brian923 I know exactly what you mean with not enough cash. Good luck with your 6.5 Swede I have a Carl Gustave and absolutely love the cartridge and the gun.

@Dean 1818 I will Search around on fourums and give a call to mentioned persons. But when i do decide on the caliber chances are ill make a post in the smithing section as to best general part selection as this will be the first AR I will build.

aubie515
October 14, 2012, 03:10 PM
I had a 6.8SPC...it's a great hunting caliber. I like it a lot, but now I've moved onto the 300BO.

I went to 300BO because it's quite suppressed and I don't need dedicated bolts and mags to run it.

ac6916170
October 15, 2012, 06:06 AM
Dedicated bolts and mags are no different than buying a dedicated 300 barrel. Buy once and forget about it. Kind of negates the "same bolt and mags" thing don't you think?

cfullgraf
October 15, 2012, 07:20 AM
Dedicated bolts and mags are no different than buying a dedicated 300 barrel. Buy once and forget about it. Kind of negates the "same bolt and mags" thing don't you think?

True, I generally build an entire new upper versus rebuilding one. But, 223 Remington components are more available and easier to find for a 300 BLK build. But for some, even saving a little is important.

As far as magazines, I have lots of 223 Remington magazines on hand. When I bought my 300 BLK, I did not have to buy any more. For a 6.8 SPC, new magazines would be required. Not a big deal unless they are out of stock.

The choice of the two rounds depends on what your purpose it. While their capabilities overlap, each has distinctly different strengths.

stubbicatt
October 15, 2012, 09:04 AM
Sometimes I think the "industry" introduces "new" cartridges simply because they know they can sell more barrels, or more finished firearms, not for any true ballistic improvement over what is already available, and that is how I view this 300 blk, and even to some extent the 6.8 spc.

I guess for some there is a use for them, but given the ballistic envelope of 300 meters, I personally don't see any true improvement over the 5.56.

cfullgraf
October 15, 2012, 10:00 AM
Sometimes I think the "industry" introduces "new" cartridges simply because they know they can sell more barrels, or more finished firearms, not for any true ballistic improvement over what is already available, and that is how I view this 300 blk, and even to some extent the 6.8 spc.



Right, but the same can be said for all the short, fat magnums that are all the rage these days. Realistically, what do they do that a 30-06 cannot?

Folks are always trying to build a better mousetrap.

68wj
October 15, 2012, 11:03 AM
Sometimes I think the "industry" introduces "new" cartridges simply because they know they can sell more barrels, or more finished firearms, not for any true ballistic improvement over what is already available, and that is how I view this 300 blk, and even to some extent the 6.8 spc.

I guess for some there is a use for them, but given the ballistic envelope of 300 meters, I personally don't see any true improvement over the 5.56.
The Whisper has been around for some time and many shooters liked it. It took a while, but eventually someone saw some potential in it enough to change the name and file with SAAMI.

The 6.8 was created because soldiers asked for something better. Remington stepped in to commercialize it too. It can be described as a compromise between carrying a .308 rifle and a 5.56. It is light weight, low recoiling, and accurate like the 5.56, but puts more energy on target, though still not as powerful as the .308 cartridge. In a general purpose role, the .300 BO is a compromise between the 5.56 and the 6.8, offering bolt and mag interchangeability with the 5.56, but increasing energy on target, though still falling short of the 6.8.

HorseSoldier
October 15, 2012, 12:37 PM
Yes, and also too much expense. Either one will cost you double or triple what you would pay to run a 5.56 gun, and a 5.56 has a flatter trajectory as well. Paper doesn't care what hits it, and steel usually doesn't unless there are issues with hearing the hit due to distance.

This. For either of them. I was pretty fast onto the 6.8mm bandwagon and think it is a great fighting rifle round, but I eventually sold all my 6.8mm stuff because the cost of taking a 6.8 SPC chambered rifle to the range and putting it through its paces was much more than doing the same with 5.56mm.

For the end of the world or something, a 6.8SPC chambered AR and a couple Conex's full of ammo might be ideal, but other than that I don't have any real use for it (outside the cool factor, and there's never anything wrong with the cool factor) -- if I ever need a rifle or carbine for home defense or something, I've got several flavors of 5.56mm ARs, for competition shooting 5.56mm is preferable, and both 6.8 and 300Blackout are too light for any hunting I might do up here in AK (and too light for a bear gun).

helotaxi
October 15, 2012, 12:45 PM
Realistically, what do they do that a 30-06 cannot?Fit in a short action rifle? ;)

rsilvers
November 16, 2012, 09:58 PM
Results- 5.56 50, 100 & 200 yds tight group center mass.
Results-.300BO 50yds 4" low of Center, 100yds= 6" low, 200yds 14-16" low
Results- AK 50yds 1" Center, 100yds= 2-3" of Center, 200yds 14-16" low


Who sights in a rifle to be 4 inches low at 100? You should sight in 300 BLK to be 3 inches high at 100, which is zeroed ar 200, and 13 inches low at 300.

Then you can shoot to max point blank range - 0 to 230 yards, with no adjustments.

David E
November 17, 2012, 10:59 AM
No, you have it wrong: they sighted it in 4" low at FIFTY yds and SIX inches low at 100

From his banter, it seemed that Larry simply attached the scope, was tickled it was as close as it was and simply didn't care to adjust it properly like a professional (or even a NON-professional) would/should.

Bartholomew Roberts
November 17, 2012, 11:16 AM
The primary determinant in how effective a bullet works is shot placement. The more your ammo costs, the more expensive it will be to get good at shot placement.

Walkalong
November 17, 2012, 05:20 PM
You should sight in 300 BLK to be 3 inches high at 100, which is zeroed ar 200, and 13 inches low at 300.With mine dead on at 100 I can hit the 5" steel plate at 300 yards almost every time from the bench. It drops further than 13", but is easily done. Flat shooting at 300 and in is over rated.
The primary determinant in how effective a bullet works is shot placement. The more your ammo costs, the more expensive it will be to get good at shot placement.Sure does.

303 hunter
November 17, 2012, 06:41 PM
I bought my 6.8 for deer hunting/target shooting out of the AR platform that I feel very comfortable with. It is a 16" SPC II 1:11 twist. I also handload everything I shoot. With the 110 V Max, I'm getting 2770 fps. Quite a bit more than the 2300 for the same weight bullet Walkalong spoke of in 300blk. I've taken 2 nice bucks this year with my 6.8 handloads;one at 75 yards,one at 170,both DRT. I've also taken deer with the 7.62x39, that the 300blk is directly compared to. Had to track most of them after the shot. As far as hunting goes,there is no comparison between 6.8 and 300blk. As far as 3 gun matches-I'd stick with the 5.56.

303 hunter
November 18, 2012, 09:02 PM
Did I get in on the butt end of this conversation? Let's keep it going! I've owned both of these. I still own the 6.8. Anyone who wants plenty of power in a compact package will pleased with the 6.8. My freezer is already full of venison!

meanmrmustard
November 19, 2012, 07:22 AM
Most of my shots at anything I can eat are within 200 yards. If I'm hunting with the AR, I just use heavy, soft point or jacketed hollow 556/223. Don't really need anything else personally.

Shawn Dodson
November 19, 2012, 09:39 AM
Then there's the 7.62x40mm Wilson Tactical - http://wilsoncombat.com/new/762x40-project.asp

It also utilizes a re-sized 5.56x45 case.

303 hunter
November 19, 2012, 12:53 PM
Then there's the 7.62x40mm Wilson Tactical - http://wilsoncombat.com/new/762x40-project.asp

It also utilizes a re-sized 5.56x45 case.
That's interesting,do you have experience with this round?

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