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Old 12-03-2010, 09:08 PM
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Default Any difference between .308 and 7.62x51 at all?



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I know that these rounds are more or less interchangable but I'm curious if there is any reason to stock both types as I own rifles chambered for both.
Old 12-03-2010, 09:53 PM
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It's a lot like the .223/5.56 only in reverse. This time the civilian load is the hotter one. Combined with thinner brass, it's not safe to shoot in the larger, looser, 7.62 chamber. But you can shoot 7.62 in .308 chambered guns, which is why they're almost always .308 chambered. Civilian guns are, anyway.
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Old 12-04-2010, 07:29 PM
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First post wins the internet
Old 12-04-2010, 08:02 PM
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Glad to hear that since it's cheaper to stock up on mil-surp stuff.
Old 12-05-2010, 03:17 PM
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Quote:
Originally Posted by MikeK View Post
It's a lot like the .223/5.56 only in reverse. This time the civilian load is the hotter one. Combined with thinner brass, it's not safe to shoot in the larger, looser, 7.62 chamber. But you can shoot 7.62 in .308 chambered guns, which is why they're almost always .308 chambered. Civilian guns are, anyway.
This.

The civilian .223 was orignally loaded as varmit cartridge. The military took it up and realize they could increase it's effectiveness on 2 legged animals by loading it up a little. So the 5.56 is usually "spicy" compared to the civilian .223

The reverse is true with .308 because the civilian .308 is often hot loaded for game hunting. Larger bullets, different powders, ect. So a thicker case meant for more spicy loads. The military 7.62 didn't need to be loaded with 180gr soft points :P So it was more effective to just keep the military 7.62 a little tame so it wouldn't shake apart military weapons.
Old 12-06-2010, 05:55 PM
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Here is the simple answer.

The Gun Zone 7.62 vs .308
Old 08-22-2012, 03:33 PM
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Funny - a lot of people who think they're knowledgeable about rifle cartridges swear up and down that .308 and 7.62x51 are the same. They're not!
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Old 08-22-2012, 04:18 PM
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Quote:
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Funny - a lot of people who think they're knowledgeable about rifle cartridges swear up and down that .308 and 7.62x51 are the same. They're not!
Except that they pretty much are.
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Old 08-22-2012, 08:47 PM
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I have a recent .308 bolt action that doesn't like 7.62x51. One time it even pulled bottom of german surplus.
Old 08-22-2012, 08:56 PM
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To add I stopped buying mil surplus. There isnt more off the grman surplus rounds. Plain jane Remingtton core lokt shoot the best for me at range and its the cheapest at .75 cents a round. When I get more time I'll pump out reloads for what I want.
Old 08-22-2012, 09:40 PM
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Basically.. The only people who would ever realize are handloaders and those with micromiters and too much time on their hands.
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Old 08-23-2012, 12:24 AM
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they are different and when it comes to surplus arms be carefull shooting .308 win factory ammo. i know M14's will not take anything over 165 grains without doing damage to the gas system and the op rod eventually. never have had an issue shooting surplus 7.62 through a .308 chamber and its a cheap way to practice field posistions.
Old 08-23-2012, 03:06 AM
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Quote:
Originally Posted by arnoldrew View Post
Except that they pretty much are.
Are they the same? Yes or no? It's not a difficult question.
Old 08-23-2012, 06:48 AM
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Quote:
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Are they the same? Yes or no? It's not a difficult question.
If you are looking for a distinct yes or no, then the answer is No. This subject has already been beat to death across the internet.

And I will leave this alone with just one of several reasons and that is primer hardness. Not going to get into the other stuff, the info is out there and I won't be debating it on this board.
Old 08-23-2012, 06:54 AM
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Quote:
Originally Posted by WhyNot View Post
If you are looking for a distinct yes or no, then the answer is No. This subject has already been beat to death across the internet.

And I will leave this alone with just one of several reasons and that is primer hardness. Not going to get into the other stuff, the info is out there and I won't be debating it on this board.
So no differences at all? Is that correct?
Old 08-23-2012, 12:44 PM
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http://www.fulton-armory.com/%5Cfaqs...FAQs%5C308.htm

You know, anyone could have looked this up for themselves. The info is all over the net in a number of places.
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Old 08-23-2012, 02:30 PM
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external case dimensions are the same... chamberings, brass specifications, and loads might vary a little between the two
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