AR-15 .223REM vs 6.8SPC vs 300AAC Blackout vs 6x45 vs 6.5Grendel vs 7.62x39...

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Some new charts I just posted in the 6x45 review. Next is the 6.5mmx42 or the Blackout, whichever barrel shows up first.

These are the ballistic charts based on tests with the 1st barrel. It shows superior range and energy.
Great hunting system even at decent range. I had almost identical results with the Hornady Match HPBTs.
Although energy is nicely retained recoils is very mild. Obviously a little more
than the .223.

6x45_87_VMAX_Chart.jpg

6x45_87_AMAX_Chart2.jpg

Here we can see how energy and speed is nicely held by the V-max.

It shows clearly 6x45 is a great 300 yards white-tail / pig rifle with close 1000ft/lb at 300 yards and
also a nice 500-600 yards coyote rifle for those who like the very long shots.

6x45_87_AMAX_Chart3.jpg

It shows clearly 6x45 is a great 300 yards white-tail / pig rifle with close 1000ft/lb at 300 yards and
also a nice 500-600 yards coyote rifle for those that like the very long shots.

6x45_87_AMAX_Chart3.jpg


These are some groups with 87gr SGKs and V-maxes. Today I didn't put a lot of time in the loads or the accuracy as I was running late and was doing things real quickly but so I was pleasantly surprised to see gruops below 1/2 MOA. one group here shot slowly gave .31 MOA. Other groups shot in rapid fire did stay nicely together.

AR15_DMR_Tan7.jpg


For the full review I posted the link here...
http://www.thehighroad.org/showpost.php?p=7590963&postcount=153
 
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AAAARGH! :fire: I didn't even get past the first response to this post and I'm already too pissed-off to finish it. Why is it that every time someone takes the time to sit down and write something they have obviously been thinking hard about, or performs some tests on something, the first reaction on this forum is to take a crap on whatever they have taken the time to post. It is really easy for the poo-poo-ers to criticize, but I don't see them taking the time to post anything thought provoking.

Ok, now I MIGHT be able to go back and read the rest of the post...
 
greenlion,
I am comparing all and finding a few more that I am considering building and there is something in each one that I love.
There is no better round, there are trade offs depending on purpose, budget and likes and dislikes.
So this is not to criticize or diminish any system, but to learn about ballistics and options.

Don't get frustrated. The more people join the more THE LOW ROAD we are going to see.

Some folks think they have some sort of entitlement to be heard above anyone else. I attribute this to the most primitive form of ignorance. Only with good manners, listening and a collaborative attitude there is the basis for good things to happen. Questioning and expressing opinions is a healthy thing, only if done the proper way.

Nobody cares about those folks... 9mm vs 40 cal, 6.8 vs. grendel, mine vs. yours and all those arguments that sound like a broken record.
So don't worry be happy and enjoy the high road. There are plenty of good reviews and opinions among our fellow members.
 
I finally collected more data on all AR systems testing with commercial loads for those there are good commercial loads. I added the 308w to compare...
The numbers are discarded after bullets reach transonic range.
Rounds with poor ballistics like the Whisper/blackout and 7.62x39 run out of steam soon but I know the 7.62x39 can be pushed a little bit more.

AR15_Calibers_01_SpeedChart.gif


AR15_Calibers_02_EnergyChart.gif
 
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My pleasure. I was pleasently surprised with the performance of the 6.8SPC loads from Wilson Tactical. Expensive but shooting very flat. A very powerful round in deed. Also the 6x45 from Corbon. Expensive too so I am working on replicating that with handloads. The classic russian and blackout run out of steam very fast as expected due to the poor ballistics. The 7.62x39 lapua is very accurate though. Also I loved the .223rem 80gr double tap. A very good round that starts slower but catches up fast due to a great bullet.

Here is the data from the spreads... The chrono is a RCBS Ammomaster
AR15_Calibers_01_Speed.gif

Energy here...
AR15_Calibers_02_Energy.gif
 
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No offense but your analysis isn't much good.

Do you have experience with ANY of these cartridges?
Click to expand...

Why, after someone has invested a lot of time thinking out and typing what is a good summary of the most popular AR calibers, does the first reply HAVE to be from someone being a complete D!ck?

I haven't even read the rest of the thread yet because the first reply made me want to nail my head to the floor.
 
The freedom of speech is great but it also has a downside. We have to listen to a lot of nonsense. I have been shooting ARs longer than some of those new-wave experts have been alive.
 
Thanks for the posts and thanks for your service

I went with 6.8 for many of the reasons you described
 
Here a drop chart from the same tests. The 6.5BR and PCC are non commercial wildcats so no commercial loads obviously. PCC I took from a friend upstate that tested on a BH built barrel using the same chrono. All very similar conditions. All charts adjusted to 300 yards zero.

AR15_Calibers_03_Path.gif

AR15_Calibers_03_PathChart.gif
 
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Dean1818 said:
Thanks for the posts and thanks for your service

I went with 6.8 for many of the reasons you described
Click to expand...
My pleasure.
This is another load I was pleasantly surprised how well it performed...
http://www.hornady.com/store/6.8mm-SPC-120-GR-SST/

In terms of accuracy the SSA 115gr OTM has been extremely accurate out of an ARP 18".

This was something I did quickly to show the POI shift and adjustment from v-max (very accurate in this barrel) to
the extremelly accurate and consistent SSA loads.
Now you do not see them...
68ARpic005.gif

Now you see them. This is all factory ammunition. No reloads.
68ARpic004.gif

This is the latest ARP 18" system. Simply amazing quality of parts. No exceptions...

68ARpic006.gif
 
1st Marine

You still there brother? I am wondering, almost six months later, have you any new conclusions? I am building my first AR and am stuck between a 6X45 or 300BLK. I will hunt, compete IDPA and use it for self defence (I won't say SHTF). Your post and thoughts are appreciated. Thanks for hanging in there.
 
lobo9er said:
This is your quote describing 7.62x39.

how so?
I'd say in multiple applications this is a pretty impressive round. You say 223 can be a great white tail round, but I'd say x39 would make a better white tail round wouldn't you?
Click to expand...
I'd say they're on par.

Neither kills deer any more or less dead within 200 hundred yards.

Barnes 55 gr copper solid hollow points, and 156 gr soft points put a hurtin on deer.
 
i can do an analysis even quicker

6x45mm = good for getting past 22 caliber deer hunting bans, not as accurate or any better than an 80 grain 223

300 aac blackout = fine for suppression, poor trajectory and not that great for more than suppression

6.5mm grendel = best for the longest range, but very wide body reduces mag capacity and can lead to feeding issues in higher rates of fire

6.8mm SPC = best overall, well-rounded for short to medium range use in a carbine

.223, best well rounded cartridge offering range, reliability, and low cost

and 7.92x39 = feeds horribly if in an Ar15, great in an AK, but short bullet means it bleeds off energy and loses velocity much quicker, greatly reducing its range
 
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