AR-15 Options for Whitetail

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John Wayne

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I'm considering replacing some guns in the collection, and would like to focus on having fewer, more versatile guns than several specialized ones. I like the AR platform for its modularity and legendary accuracy, and I am seriously looking at an alternate caliber (i.e., not .223/5.56) to fill this void.

This rifle needs to be fun to shoot, extremely accurate, and 99% reliable. As this will not be intended for SD (I prefer a handgun for that role), I would rather have it be accurate at the expense of an occasional FTE, but of course accurate and reliable is always better. My requirements for accuracy will not be satisfied by "accurate enough for hunting," quite simply because I derive great satisfaction from punching tiny groups of holes in paper.

Despite going the AR route, I don't want a tactical-whiz-bang ninja rifle. I am looking at 20-24" bbl, fixed stock, full handguard with no rails.

As for the "why not an AR in 5.56 and a cheap bolt gun" argument, my reasons are that I love to shoot. I also like to hunt, but if I can get two or three deer a year for my freezer I'd just as soon stay in bed in the morning :D As such, I see no reason to spend a lot of money on a rifle I'll use a few times a year. I'd rather save my money and put it toward a rifle I will shoot often and become more familiar with, that can also be used for hunting. I thought about the AR-10 route but cost is a factor, and I would like to build my rifle from readily available parts.

I also handload, and have no problem using a brass catcher and not having factory ammo on hand (but cheap, readily available ammo is always a plus). Shots will be 300 yards max, most likely 50-150 yd. based on the deer I have taken in the past few years (all with .270 Win). Caliber needs to be considered humanely effective to at least 200 yards, preferably more--farther shots would be headshots if there's any doubt as to effectiveness (so it's either a hit or a clean miss with no harm to the animal.)

Right now, here's what I'm thinking:

7.62x39 is readily available, and with comparable ballistics to the .30-30, it will certainly do. However, it has a reputation for poor accuracy--I'm not sure if this is due to cheap Commie ammo, .308 bullets in .311 bores, or what. I have also heard of BCG strength problems with this caliber.

6.8 SPC is supposed to offer better short range knockdown power than the 5.56, but I'm not sure of its long-range performance.

6.5 Grendel, from what I've heard, is an excellent long-range cartridge with very good wind-bucking properties and great accuracy. I tend to be suspicious of calibers named after mythical creatures, and brass is very expensive, but other than that I have no problems with this cartridge.

.25 WSSM Would probably offer ideal performance, but I'm hesitant to shoot anything labeled "magnum" out of an aluminum-receivered gun. I plan on doing a lot of shooting, would this caliber batter the gun apart?

I'm setting the upper ceiling limit around $1,000 for the rifle itself. Scope/sights, brass, dies, etc. are in a seperate budget.
 
6.8 rem spc seems to be the "winner" in popularity for good reasons. Although the 6.5 grendel is better on paper, since it lost the popularity war, support / ammo for the 6.8 will be better. I'd stick with one of those two however, not your other two choices.
 
John - if punching tiny groups in paper is all you are concerned about, the AR platform isn't what you are looking for, that's what bench guns are for. They are accurate, but not to any extremes.

As for the 7.63x39 - it can be a very accurate round. There are examples of .33 inch groups here from Krochus using that round.
 
7.62x39 is readily available, and with comparable ballistics to the .30-30, it will certainly do. However, it has a reputation for poor accuracy--I'm not sure if this is due to cheap Commie ammo, .308 bullets in .311 bores, or what. I have also heard of BCG strength problems with this caliber.

Yes, the bolt face wall is very thin. Another issue is that the cartride is quite tapered, and the straight portion of the AR-15 magazine doesn't handle that so well.

6.8 SPC is supposed to offer better short range knockdown power than the 5.56, but I'm not sure of its long-range performance.

If you're staying under 300, no problems. True the Grendel is all over the 6.8 past 500-600yds but to me it only matters if you're into long-range target shooting. Plus, 6.8 SPC works well in short(er) barrels, 20" doesn't get you much velocity over 16" and 24" would be overkill. Brass/ammo is fairly available. A good load is something like 110gr Sierra Pro-Hunters driven by 29.5gr of H322 (usual warnings and caveats apply). My pick for a hunting AR-15. Seems to be the go-to AR caliber for hogs.

6.5 Grendel, from what I've heard, is an excellent long-range cartridge with very good wind-bucking properties and great accuracy. I tend to be suspicious of calibers named after mythical creatures, and brass is very expensive, but other than that I have no problems with this cartridge.

Has same issues with regard to bolt face and tapered cartridge as 7.62x39, not surprising since it is a necked up 6mm PPC which is itself derived from .220 Russian which is a necked down 7.62x39. Plus it's relatively expensive to shoot, only Alexander Arms and Lapua make brass, though you can fireform brass pretty easily from 7.62x39 brassh. It is the cartridge if you want to reach 1000yds in an AR.

.25 WSSM Would probably offer ideal performance, but I'm hesitant to shoot anything labeled "magnum" out of an aluminum-receivered gun. I plan on doing a lot of shooting, would this caliber batter the gun apart?

The bolt interfaces with the barrel extension in an AR. The receiver is only to hold everything together. I would be more concern with any possible feeding, magazine (I think it's single stack, and overall cartridge length may be an issue with some factory ammo) or bolt face issues. I think you can only get this caliber from Olympic Arms and DTech and maybe a few others; some people have a problem with Olympic based on their past lower quality, don't know how they are today.

Also check out the new .30 RAR, though it may be another orphaned Remington cartridge soon (they also came up with 6.8 SPC but others have carried the 6.8 banner after they forgot all about it). It is not as interchangeable partswise with vanilla 5.56 AR's as some of the others.
 
Could he use a .243 Win, or would that have the same problems as the 7.62?

Edited to add: or require a whole different platform, oops. 6.8 looks pretty impressive.
 
John - if punching tiny groups in paper is all you are concerned about, the AR platform isn't what you are looking for, that's what bench guns are for. They are accurate, but not to any extremes.

As for the 7.63x39 - it can be a very accurate round. There are examples of .33 inch groups here from Krochus using that round.

Tiny groups in paper aren't all I'm concerned about, they just make range trips much more rewarding for me. I don't want to buy a rifle, take time to zero it, load ammunition for it, drive out to the range, spend lots of money and have it be "minute of large dirt clod" accurate--I've owned plenty of guns that could do that. I'll shoot the Mosin-Nagant if I want to bust rocks :) I'd be satisfied with 1.5" at 100 yards.

Also, I chose the AR not because it is the best at any one thing, but because it can do a variety of things very well. It is not the most accurate or the most reliable or the most powerful, but I feel it offers the best balance of fun, shootability, and performance.

Do you happen to know if 7.62x39 mag issues have been solved?

Yes, the bolt face wall is very thin. Another issue is that the cartride is quite tapered, and the straight portion of the AR-15 magazine doesn't handle that so well.
If you're staying under 300, no problems. True the Grendel is all over the 6.8 past 500-600yds but to me it only matters if you're into long-range target shooting. Plus, 6.8 SPC works well in short(er) barrels, 20" doesn't get you much velocity over 16" and 24" would be overkill. Brass/ammo is fairly available. A good load is something like 110gr Sierra Pro-Hunters driven by 29.5gr of H322 (usual warnings and caveats apply). My pick for a hunting AR-15. Seems to be the go-to AR caliber for hogs.

Does the 6.8 SPC have the same bolt face issues as the 7.62x39? Are 6.8 SPC mags double-stack? Can it use heavier bullets, such as those in the 130-150 grain range?

Also check out the new .30 RAR, though it may be another orphaned Remington cartridge soon (they also came up with 6.8 SPC but others have carried the 6.8 banner after they forgot all about it). It is not as interchangeable partswise with vanilla 5.56 AR's as some of the others.



I looked into the .30 RAR but I too have doubts as to how long it'll last; the 6.8 took off, 6.5 is popular for long range, .25 WSSM is also chambered in bolt guns, but it seems many regard the .30 RAR as not having enough performance benefits over the 7.62x39 to justify the expense and scarcity.

--
Could he use a .243 Win, or would that have the same problems as the 7.62?

.243 Winchester would require an AR-10 receiver. It is a fine cartridge in its own right, but it won't work with the AR-15 platform.

Thanks for the input, guys. Further advice is always welcome.
 
DPMS 6.8 SPC 20'' barrel.

http://www.dpmsinc.com/firearms/firearm.aspx?id=26

Don't know if it's too tactical for you. I think it would fill the role pretty well. Not sure if 6.8 SPC is something you want to shoot a lot of because its not cheap right now. If you reload then go ahead and fire away. You should be fine hunting whitetail to 300 yrds (Most shots aren't even that far.)
 
Do you happen to know if 7.62x39 mag issues have been solved?

No idea, really, though I think it's inherent in the design of the AR-15 magwell, there always has to be a straight section.

Does the 6.8 SPC have the same bolt face issues as the 7.62x39? Are 6.8 SPC mags double-stack? Can it use heavier bullets, such as those in the 130-150 grain range?

The bolt face issue doesn't seem to be a real problem in 6.8. The 6.8 case head diameter is only 0.035" larger than .223/5.56, whereas the 7.62x39/Grendel case head is 0.068 larger. 6.8 mags are double-stack. You don't lose much capacity either, a 25rd 6.8 mag is about the same size as a 30rd 5.56 mag, and Barrett makes a 30rd 6.8 mag that is slightly longer.

I've seen 6.8 load data for for 130gr bullets but 110gr/115gr seems to be the most popular large bullet. 68forums.com has a lot of load data and other information.
 
I've hunted deer with 6.8 SPC and it worked fine.

Another option is .300 Fireball/Whisper. Feeds from 223 mags, uses the normal bolt. Can shoot 240's subsonic at 1100 fps or full-power 125-150gr hunting bullets at 1800-2100+ from a 10" barrel (SBRs not OK for hunting in all places, but it would be a little faster in a 16")
 
I went the 6.5 route simply because I am a shooter first and hunter second. I really wanted the capability to reach out further at the range. As far as hunting goes, I think (and evidence seems to back it up) that the 6.5 grendel and 6.8 spc are about equal as a hunting round. Sure the 6.5 can shoot flatter and farther, but just because it will go farther doesn't mean you should be killing big game out to the extreme. I am taking my grendel out this morning to hunt deer with. I loaded up some 120 grain barnes TTSX with 26 grains of TAC. It should be enough to take one down as long as I hit where I am aiming. Another reason I went with the grendel is because brass can be made from 7.62x39 brass. I figured that if it ever went belly up that I would have a cheap, reliable source of brass even if they stopped making it.

The 6.5 will take better advantage of the 20-24" barrel than the 6.8 simply because the 6.8 doesn't seem to get much from longer barrels. The 6.8 is great in short barrels because it doesn't lose much in velocity with short barrels. The 6.5 really seems to shine in 24" barrels. I believe that either the 6.8 or 6.5 will give you as much accuracy as your little heart can desire so there is no advantage with either one in that department. Here is a link to the Elk that Mark LaRue shot at 400 yards with the grendel.

http://www.ar15.com/forums/topic.html?b=2&f=219&t=164444&page=2

here are some pictures of what I have done with the grendel.

left is a 7.62x39 necked down to 6.5. middle and right is the fireformed case into 6.5 grendel.
CIMG3411.jpg

6.5 grendel rockchuck kill.

6360_1193907208571_1255148157_30557.jpg
 
Has same issues with regard to bolt face and tapered cartridge as 7.62x39, not surprising since it is a necked up 6mm PPC which is itself derived from .220 Russian which is a necked down 7.62x39. Plus it's relatively expensive to shoot, only Alexander Arms and Lapua make brass, though you can fireform brass pretty easily from 7.62x39 brassh. It is the cartridge if you want to reach 1000yds in an AR.

Lots of fallacy in this paragraph. First, the grendel is NOT a tapered case. It is a straight walled case. Second, Wolf makes brass as well. However, you have to get it from loaded ammunition as they don't sell the brass by itself.
 
I have made some 6.8 handloads that I am going to try on deer this year. Too bad the season is not here or I would let you know reslults. I started to go the 6.5 way, but the brass just seemed to be rediculously high. It should work well though.
 
in Indiana your only choice is 458 SOCOM.


Which kinda stinks cause it is WICKED expensive.
 
In a more perfect world, where 6.5 was easy to find and inexpensive, I'd suggest that.

In this one, I'd go for the 7.62x39mm. Based on what you've said, your average deer shot is likely to be around 110 meters- perfect 7.62x39mm range.

J
 
I've been using 7.62x39 and 6.8SPC in AR15s for a number of years now, both on hog and deer. Both have sufficient power to drop a whitetail inside of 300 yards. I prefer the 6.8SPC for a number of reasons; other prefer the 7.62x39 for the availability and low cost of imported steel-case ammo. I have multiple uppers for each, so I'm pretty well invested in both and don't have much ax to grind one way or another.

Silver State Armory is selling 6.8SPC Nosler 110gr Accubond loads for $22/box. That should be a heckova good general hunting load, and it's what I'll likely use if I don't use handloads. To date, I've been using handloads topped with a Hornady 115gr OTM.
 
I will be taking a 6.8 SPC to the woods this year for deer and hogs. Shooting a 16" Rock River Midlength with 1x-3x Weaver Classic scope, handloaded 110 grain Sierra Pro Hunters, and handloaded 110 grain Nosler Accubonds. Much thanks to rbernie for suggestions into rifles, optics, and ammo.

Just my .02,
LeonCarr
 
I am glad to see more interest in the AR15 being used as a deer rifle. I own both AR15 25wssm and AR15 6.8spc. As a reloader you understand the vast difference in the water volume of these two cases. The Oly 25wssm upper of mine is HEAVY. It will be going out this winter to be cut down and turned down. My last AR will be a 458 Socom. The trigger on most AR’s suck, I have a Timney on the 25wssm and Bill Springfield trigger job on the 6.8spc. Bill’s is almost as good as the Timney but $150 less.



Someone should come along soon with the Remington new 30RAR. It has a water volume of 44gn and launches a 30cal 125gr pill at 2800fps. The 30RAR makes the old 300 savage look fast… The 25wssm has a water volume of 50gn. My 120gr Noslar Partitions are almost at 3000fps (I do not load hot). The wssm case maxes out the useable space in an AR15 magazine. Like it or hate it, the wssm case is the largest water volume bottle neck case in the AR15 world. If you are building an AR15 DEER rifle the wssm case is your best bet.



http://www.dtechsuperstore.com/WSSM page.htm



http://www.triggerwork.net/arparts.html



http://www.wssmzone.com/main/default.aspx?c=reloading&c2=reload257&c3=reload257data&n=reloading&d=1



http://www.shootingtimes.com/longgun_reviews/ST_r15andthe30rar_200905/index.html







Good luck.
 
Tiny groups in paper aren't all I'm concerned about, they just make range trips much more rewarding for me. I don't want to buy a rifle, take time to zero it, load ammunition for it, drive out to the range, spend lots of money and have it be "minute of large dirt clod" accurate--I've owned plenty of guns that could do that. I'll shoot the Mosin-Nagant if I want to bust rocks I'd be satisfied with 1.5" at 100 yards.


In that case, I believe that there are a couple of 7.62x39 AR owners on this board. I'd put a thread out specific to this platform/caliber combo and see what you get. I suspect that this will be the easiest ammo to find and will fill all of your needs out to 250-300 y (including your 1.5 moa groups). Best of luck.
 
I went with the 7.62x39 because of ammo availability and cost. I also reload. If ya want cheap, the 7.62x39 is the way to go. If you reload, it gets better. But be warned. Boxer primed brass is not cheap. It's why I have a brass catcher on it. Here is some pics of my gun and some of the groups it shot: http://www.pixagogo.com/4825444121 And I'm not done testing. Click on a pic to make it bigger, then click on original at the top to blow that up. It's a cheap Model 1 upper with an old Leupold 3x9 compact hunting scope on it. It is ammo sensitive, but once you find what it likes, a deer should be no problem. Or a cat for that matter.
 
You could try the new .30 remmington upper or get a DPMS LR-308. Fun to shoot & can hunt. Not a lot of weight. Yeah yeah I know knew rifle, but that is the fun part.
 
Grendel ammo is not that expensive if you buy Wolf, which is $15 a box at cabelas. I assume you could reload that brass after you shoot it so I wouldn't really consider 6.5 grendel to be a significantly more expensive option than 6.8 in regard to ammo. However I don't own either so I really am just pointing out what I've seen looking around.
 
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