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  #1  
Old June 10th, 2006, 12:06 PM
Jack Flacket Jack Flacket is offline
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So yeah, I was taking apart an m-14/s 7.62 that my friend had just bought because the return spring was all sidways and off of the guide. and I noticed that the ammo that he was given with it was .308 and not 7.62. I'm wondering if the two are interchangeable like 38 and .357 are. any thoughts?
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  #2  
Old June 10th, 2006, 12:47 PM
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TheMrMitch TheMrMitch is offline
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Welome to the site Jack Flacket.

Indeed, your question has been asked many, many times and the answer has been yes, but refrain from that if you can. There are several reasons that I'm sure the members will chime in and explain.
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  #3  
Old June 10th, 2006, 02:50 PM
Hoss Hoss is offline

 
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There are no problems with using .308 ammo in an M14. The 7.62 Nato round is very nearly the same as commercial .308 ammo, but the tolerances on a 7.62 chamber are not as tight. This is intended to help with the durability and reliability of military weapons.
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Old June 10th, 2006, 04:11 PM
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Hawk45 Hawk45 is offline
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Only time I have ever heard of 'civilian' rounds hurting a M1 or M-1A for that matter were in the M1 when 220 grain rounds were fired. They fired OK, just bent the op rod.

Only thing is critical is bullet weight as it affects back pressure on the moving components like the op rod.

I shoot Federal Match grade 308 all the time in my various M-1A's. So far after about 10,000 rounds + there has been '0' problems.
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Old June 11th, 2006, 01:04 PM
Cornbread2 Cornbread2 is offline
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Quote:
Originally posted by Hawk45:


I shoot Federal Match grade 308 all the time in my various M-1A's. So far after about 10,000 rounds + there has been '0' problems.
The vast majority of highpower shooters that still use the M1a in competition that shoot factory ammo use the Federal Gold Medal Match .308.

It is loaded with the 168 SMK.
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  #6  
Old June 11th, 2006, 09:44 PM
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Mannlicher Mannlicher is offline
 
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My M1A SOCOM dotes on Federal Classic 150 grain SP. The pigs I hunt with it are not big fans though. [img]smile.gif[/img]
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  #7  
Old June 13th, 2006, 08:36 AM
Dave S Dave S is offline
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Rule of thumb for M1A/AR-10:

Bullet wt. Max fps with proper powders
143-150gr ------ 2820fps
165-168gr ------ 2700fps
175-180gr ------ 2600fps

165-168gr ------ 2600fps makes 'em last forever.
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  #8  
Old June 14th, 2006, 12:04 AM
BD BD is offline
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I use 150 grain no matter what I shoot.Its an M14 s polytech and had 13,000 rounds on it in 12 years and still running nice.
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  #9  
Old June 18th, 2006, 11:42 AM
Jack Flacket Jack Flacket is offline
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Awesome gang, thanks for the info! glad to be a part of the site!
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  #10  
Old July 6th, 2006, 10:46 PM
Seventh Fleet Seventh Fleet is offline
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You said your rifle is an M-14/S which says Poly-Tech to me and if the bolt has NOT been changed out to a GI bolt.... Then NO NOT shoot .308 Winchester in your rifle.

This is because the head space on unmofified Chinese M-14 clones is waaaay to long for .308 Winchester. The .308 is designed for SAAMI head spaced chambers and NOT 7.62x51 NATO chambers, as the M-14 and all of the Chinese M-14 clones were.

For more info go to this link...

http://www.armalite.com/library/techNotes/tnote11.htm


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