.308 ar ?

Discussion in 'AR15/10 Rifles' started by kc, Nov 8, 2011.

  1. kc

    kc Well-Known Member

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    Is a .308 in a AR to much for the rifle recoil in the long run?
     
  2. ICANHITHIMMAN

    ICANHITHIMMAN Well-Known Member

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    I dont understand the question? There is very little felt recoil? IF thats what you mean.
     

  3. Kevin Thomas

    Kevin Thomas Well-Known Member

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    Keith,

    If you're talking about the guns themselves, you talking about two very different animals; the AR-15 vs. the AR-10, SR-25, etc.. Larger, beefier and perfectly able to handle the heavier recoil of the larger round. AMU has been using the M110 30 cals as 1,000 yard guns, getting away from the 5.56s in M16s they've been using for years, and yet side-stepping all the inherent problems that go with the M14 family. Getting very good results too, from what I've heard thus far.

    I'll be able to tell you a bit more down the road. Steve Satern set me up with a SS 1x10" barrel chambered for the .308 Win this past weekend, so I guess I'm building a new M110 1000 yard gun this season.
     
  4. LouBoyd

    LouBoyd Well-Known Member

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    You didn't say what weight you're 308Win rifle would be. A 12 lb 24" bull barrel LR-308 has less than half the felt recoil of a 7 lb 16" thin barrel LR-308. I own both. On the lighter gun a 1/2 rubber butt pad is desirable to prevent shoulder bruising. I don't consider either of them high recoil.
     
  5. kc

    kc Well-Known Member

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    I was thinking of the recoil damaging the AR in the long run from using the calibre.
     
  6. LouBoyd

    LouBoyd Well-Known Member

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    You don't have to worry about that since an AR-15 can't handle 308 rounds though it's magazine. They way too long. The AR-10s are plently strong for a a 308 Win with larger and heavier bolts and locking lugs. They're even chambered in 300 SAUM and strong enough for them.

    There's also the Olympic 300 OSSM which is a 25 WSSM necked up to 30 caliber and works in an AR-15 upper. It's bolt and barrrel extension are heavier to to take the higher pressure and larger size than other AR-15s, but it too is stronge enough and gives nearly identical performance to a 308 when shooting 150 grain bullets (same as military ball ammo)

    AR-15 stocks and receivers are much more likely to be damaged by rough handing like dropping them onto rocks than from recoil. The only parts under pressure from the propellent are the barrrel, barrel extension, and the bolt. The locking lugs are the weak part on mil-spec AR-15s, but plently for 5.56x45 and lower pressure rounds like the 50 Beowulf and 458 SOCOM.