ar15 .270 conversion

Discussion in 'AR Talk' started by Reload 02, Sep 3, 2008.

  1. Reload 02

    Reload 02 XDTalk Member

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    Does an ar15 .270 conversion upper exist? If not what about .243?
     
  2. rsb5772

    rsb5772 XDTalk 100 Member

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    I've seen a .243 WSSM.
     
  3. vafish

    vafish XDTalk 1K Member

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    .270 is based on .30-06 case. Will not fit standard AR15 or AR10 receivers. IIRC Cobb rifles makes a semi auto AR like rifle in .30-06, they may make .270 as well.

    .243 is based on .308 case. It will not fit in standard AR15 action. It will fit in AR10 action and a couple of companies make .243 AR10's.

    If you want a .270 caliber in the AR15 look for a 6.8 SPC. It's a fairly new round made for the spec ops guys that wanted something bigger than 5.56/.223. Remington makes ammo for it and many people are making AR's or upper kits for it.
     
  4. Sharkbait

    Sharkbait XDTalk 500 Member

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    According to Modern Reloading Second Edition by Richard Lee the Overall Lengths are as follows:
    .223 Rem is 2.26” long (pg 222 )
    .308 Win is 2.81” long (pg 424)
    .270 Win is 3.34” long (pg 331)
    And by way of comparison the 30-06 Spr is 3.34” long (pg 444)

    My point is that a .270 Win will not even fit in a .308 chambered AR or the magazines, it is .53” longer than the .308. If you do some hunting I am sure you will find someone making an AR platform long enough to handle the .270 but I am guessing you will pay out the … for it and I am not talking about your nose.

    Good luck and happy hunting.
     
  5. Cuda66

    Cuda66 XDTalk 10K Member

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    Well, technically...

    6.8mm SPC is .270 caliber.

    However, it's not the same as the classic .270 Winchester round.

    You could, however, get a .243 WSSM upper for an AR-15...but not a .243 Winchester (as mentioned above, you would need to go to an AR-10 platform for that).
     
  6. Reload 02

    Reload 02 XDTalk Member

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    I don't "need" a .270. I am new to ARs and had heard there a lot of conversions and was curious. I love my new AR but I really like my 270 and was wondering ably it. What is the effective range on 223? And how is the drop past 100 yards? I just got me Stag 15.
     
  7. Uncle Giggles

    Uncle Giggles XDTalk 500 Member

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  8. gsh341

    gsh341 XDTalk 5K Member

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    Here you go.

    Remington.com - Products - Ammunition - Ballistics

    200 yds
    .223 -2.3" / .243 -1.6" / .270 - 1.8"

    300 yds
    .223 -12.9" / .243 -8.8" / .270 -9.8"

    There's lots of other calibers and numbers here as well as free ballistics software.

    Enjoy! ;)
     
  9. Sharkbait

    Sharkbait XDTalk 500 Member

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    NRA and CMP competitions are regularly won at ranges out to 1k yards with the .223 round. If you want to punch paper the .223 is effective out past 1k yards, putting game (or a person) down with a .223 varies depending on a whole lot of factors such as bullet weight or your intended target. Effective range has many variables andif you ask 10 shooters what constitutes effective range you will get 10 different answers. The easy one is paper punching and you can do it all day long with the right upper assembly.
     
  10. rykdawgg6601

    rykdawgg6601 XDTalk 1K Member

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