AR-10's and lrh

[vendetta333]

hey guys, this is my first post and havn't yet checked out the entire site. but i was wondering; a, which thread should this be in? and b, does anyone here freaquently use an ar-10 platform for their lrh. what cals, etc. im looking at the Armalite AR-10T RIFLE .260 REMINGTON SS NM to pull double duty as my all around hunter and match gun. i can hand load too so...
anyway, all thoughts and comments appreciated. and again sorry if its the wrong thread.

 

[true1911]

Since no one else has replied I'll give this a shot. I'm in the process of building an AR-10 Style ((DPMS footprint) 7mm-08 for shooting out to 1400 yards with. I have spent a lot of time shooting one in 308 at long range but feel that the .308 is limited in LR capabilities. I probably won't be taking the rifle deer or elk hunting but will mostly use it for long range coyotes and the occasional rockchuck.

I am building it in 7mm-08 as I have a preference for the LR 7mm bullets available. Its also my opinion that the barrel will last longer in 7mm-08 than it would in 260.

Most people will tell you that an ar-10 style platform is too heavy to hunt with. However, on this forum most of the rifles people are shooting at long range tend to be on the heavy side so as long as you are okay packing it I say go for it. My personal preferences are for a heavier calibers on long range big game but I'm sure it can be done with a .260.

AR-10s are great when a fast follow up shot is needed. Some of them will even give a bolt gun a run for its money accuracy wise. Depending on what you're doing and how far you're shooting it could make a fine LR Hunting rifle.

 

[captacademy]

I too have just picked up a DPMS 308 AR-10, which I plan to use for LRS. In addition, I also picked up a DPMS upper in 6.5 Creedmore for long range work. Generally, I shoot bolt guns, but wanted to give the autos a try!

I won't be using them for hunting though, it will be a bolt gun.

 

[vendetta333]

thanx guys, i was wondering if my post had been shunned lol. im not too familiar with the ballistics of the 7-08. never really thought about it is all. but i have also not heard anything about the 260 burning barrels. where did you hear this? or are you just saying that the 7-08 would just last longer anyway, not that the 260 is a burner? last question, can the wsm's be used in the ar-10 platform? if so, i would think that for out to 1400 you'd want the 270/7mm wsm. thanx again for the feedback guys.
o, and yes, the armalite im looking at is a match ready rig, minus the scope, and has an MOA guarantee. gun)

 

[true1911]

I'm not implying that a .260 is a barrel burner but barrels will not last anywhere near as long as a .308. In fact if you put them in order of best to worst it would look something like this. .308, 7mm-08, .260, .243.

There are a few WSM's built on this platform but they are mostly .243WSM or the SAUM's. There are issues with magazines just for starters.

I have a couple of 7WSM's and with 30 inch barrels and high BC bullets they are pretty tough to beat out to 1800 yards. You can make a .308 work out past 1100 yards so I'm assuming that with better bullets you should be able to get a 7mm-08 to work out to 1400 but haven't tried it yet.

I also have lots of .308 brass and can neck down to 7mm-08 in one step. For me that makes it more economical to shoot than .260.

(when I say "work", I mean stay supersonic, not shoot animals with.)

 

[Crop Damage]

I use a DPMS LR308 pretty often for shooting deer on crop permits. I don't shoot it beyond 450 yards. I usually set up within 350 to 400 yards of the woods line, and try to shoot each deer as soon as it enters the field. Mine likes the hornady superformance 150 SST's. One shot kills, dumps them on the spot usually. I've killed up to 5 at once before the group could get out of the field. Very low recoil, fast follow up shots, and you can stay right on the scope until the next deer slows down a little. I installed a Geseille (sp?) super three gun trigger, which is a huge improvement over the factory trigger. That really isn't true long range shooting, but it is exactly what I bought that rifle for, and it does a great job. I don't use it during the regular gun season though. Its really heavy and awkward, and it sure helps to use a shooting bench and a chair.

 

[Camshaft]

Long range shooting is all about perspective. 200yards may not seem far, but it is with a 22lr. I have heard somewhere about 7mm saum's being built on ar platforms. You might also look at some of the 6.8mm cartridges out there. The .277 is a real gem at long range with the right bullet.

 

[BigSkyGP]

the problem with the 6.8 SPC is the bullet selection on the market. It's kind of slim. with 115gr SMK its supposed to keep up with 147gr 308 out to 400yds for trajectory and energy.

I've used 110gr Barnes out to 200yds on mule deer, and it works just fine. Will it drop elk? I'm thinking it would work similar to 150 308, based on my observations. May not want to get too far out there, and wouldn't want to hit the shoulder area. Could 130gr be single loaded for longer range work, I think so, but its a bit awkward in the AR, then again one shot one kill!

I'm begining to lean for the 458 socom, It will shoot and carry like a 45/70, If the buffalo hunters made that work out around 400-500yds, then it would be fine even further on mulies and elk. Would probably require a sort of vernier tang sight for the elevation required.

 

[long450]

Nothing wrong with a 260 Remington. I have the DPMS and it shoots well. I also have the 308 and the 300 SAUM. I believe that the 260 and 308 are limited to under 600 yards for deer size animals when shot out of most AR platforms. Punching paper your good to 1000 yards ao beyond.

 

[Greyfox]

I have a Reminton R-25, which is a DPMS, in 7mm-08. I was pleasantly surprised that after break in and another 60 rounds through it it settled in at .5moa. It does this with either hand loads or a couple of factory loads. With a Leupold 3.5x10 MK4 on it I have a nice Northeast shooter good out to 600 yards or so. The trigger was junk....replaced it with a Rock River Match with a JP 3.5# spring kit. It is little heavy but the balance and ergonomics make up for it.

 

[captacademy]

I just picked up a DPMS in 6.5 Creedmoor with a 24" bull barrel. The trigger is also junk. I have not shot it yet, but plan on putting an after market trigger. Does the
Rock River with the JP Spring just drop in or do I need a smith. Would I be better off putting another brand trigger? It's an AR-10 308 Lower in DPMS.

 

[Greyfox]

I just picked up a DPMS in 6.5 Creedmoor with a 24" bull barrel. The trigger is also junk. I have not shot it yet, but plan on putting an after market trigger. Does the
Rock River with the JP Spring just drop in or do I need a smith. Would I be better off putting another brand trigger? It's an AR-10 308 Lower in DPMS.

The RR trigger drops in and takes only about 5 minutes to install. Not all aftermarket triggers that work in an AR -15 lower fit the AR-10. The Jewel does not fit. The JP spring kit takes about a pound off the RR. You may want to try the RR w/o the spring kit first......I've tried several. The RR is as crisp as the Geiselle Match Enhanced at half the price.

 

[captacademy]

Great! I will give the RR a try and will order the spring as well. I currently have a RR in 223 and reallly like the trigger. What size pin does the DPMS the 308 lower have?

 

[Greyfox]

If you mean the pins that hold the trigger parts through the frame, they are the same size as the AR15, .154