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Old September 18, 2009, 11:36 PM   #1
Latex Ducky
Join Date: August 31, 2009
Posts: 74
Differences between 7.62x51mm and .308

Are the diferences the same as for 5.56 and .223? That is a common comparison but I never see 7.62 to .308 compared but people seem to refer to them as the same.

Last edited by Latex Ducky; September 18, 2009 at 11:42 PM.
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Old September 18, 2009, 11:40 PM   #2
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Join Date: February 15, 2009
Posts: 408
.308 is 7.62x51

(EDIT) you changed the post title from 39 to 51 so this is irrelivant)

and the .308 (civi) is a little longer than the 7.62 (mili) in order to help stop jamming.

Last edited by M4Sherman; September 18, 2009 at 11:48 PM.
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Old September 18, 2009, 11:45 PM   #3
Join Date: February 12, 2001
Location: DFW Area
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Here's a decent writeup/discussion.
Did you know that there is a TEXAS State Rifle Association?
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Old September 19, 2009, 10:15 AM   #4
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Bottom line is that 7.62 and .308 are the same round. Military cases have a thicker internal web, so the case capacity is a bit less than commercial .308 cases. If you try to put a hot .308 load into a military case you could have a problem. Factory loaded .308 and 7.62 ammo is 100% interchangeable.
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.308 , 7.62

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