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highender
03-04-2013, 8:15 AM
Hello All :

Just need some advice. I have a rifle , a Howa 1500 , that shoots .308 Win ammo.

I heard that it can also shoot 7.62 Nato, or 7.62 x51 or 7.62x 39.

I heard that since it can shoot the commercial .308 Win, then it can easily take all the above 7.62 rounds.

Then , I hear that those are different ammo, and my rifle is better served NOT using 7.62 rounds, and stick only to .308 Win.


Is that correct ?

r8dr rider
03-04-2013, 8:29 AM
Think of 556 and 223 but backwards. If your barrel is stamped with 308 then you can shoot 308 and 762x51. Do not shoot 762x39. Also refer to your owners manual.

Crusader
03-04-2013, 8:41 AM
Yes, 7.62 is the lower-pressure version of .308 just as .223 is the lower-pressure version of 5.56

Do not chamber 7.62x39, it is a totally different round. Shoot .308 and 7.62x51 only.

jben
03-04-2013, 8:44 AM
weber has your answer.

I am curious who told you a .308 could shoot a 7.62x39?

Thedomsaww
03-04-2013, 8:44 AM
i have the same rifle and shoot 7.62x51 allot cause its cheaper. I find its a little cleaner too less fouling.

nastyhabts26
03-04-2013, 8:46 AM
Ummmmmmm 7.62X51 is just another international term for .308 Winchester

Thedomsaww
03-04-2013, 8:49 AM
well yes and no. like someones said think of 223 and 556. If u have a rifle chambered to 308 u can shoot 308 and 762. But if ur rifle is chambered in 762 its not a good idea to shoot 308

alfred1222
03-04-2013, 8:56 AM
Ummmmmmm 7.62X51 is just another international term for .308 Winchester

No it's not, it is the NATO version of that round. While the dimensions are the same and a gun can concievably fire both, 308 runs at higher pressures that 7.62x51

dmckean44
03-04-2013, 9:08 AM
well yes and no. like someones said think of 223 and 556. If u have a rifle chambered to 308 u can shoot 308 and 762. But if ur rifle is chambered in 762 its not a good idea to shoot 308

There's almost nothing out there that's chambered in 7.62x51 NATO that can't handle the extra pressure of .308 Win. Unlike with .223 and 5.56, this is a non issue.

Cheezle56
03-04-2013, 9:21 AM
There's almost nothing out there that's chambered in 7.62x51 NATO that can't handle the extra pressure of .308 Win. Unlike with .223 and 5.56, this is a non issue.

I think the concern for shooting .308win out of 7.62x51 has more to do with some nato chambered guns having very loose chambers, fluted chambers, unsupported chambers or their method of operation potentially causing the thinner .308win brass to give out.

furyous68
03-04-2013, 11:53 AM
I think the concern for shooting .308win out of 7.62x51 has more to do with some nato chambered guns having very loose chambers, fluted chambers, unsupported chambers or their method of operation potentially causing the thinner .308win brass to give out.

^^ This is what I have found when researching the subject. 7.62x51 has a thicker case & the chamber tolerances are looser than one chambered specifically for .308WIN. This typically would allow for over-expansion of .308 brass in a 7.62x51 chamber. I believe there is also a dimensional difference between the casings. The .308 is slightly shorter, and there is a difference in the shoulder: http://www.gophoto.it/view.php?i=http://www.gunandgame.com/forums/attachments/powder-keg/32438d1275575879-new-pics-hk-case-separations.jpg#.UTUJklfiiYk

svthuh
03-04-2013, 12:48 PM
No it's not, it is the NATO version of that round. While the dimensions are the same and a gun can concievably fire both, 308 runs at higher pressures that 7.62x51
This.. I have a 7.62x51 Parker Hale barrel and it was PROOFED at 20 tons (40k PSI) .308 max loads for a similar weight as most 7.62 NATO ammo, 150gr, is roughly around 60k psi.. Or 30 tons.

BIG Difference and not worth the risk.

highender
03-04-2013, 1:54 PM
THanks. Got it. So basically I can shoot any 308 win and 7.62x51 .



Can't recall, but glad that I did not shoot any 7.62 x39 out of it.

Army
03-04-2013, 2:05 PM
40 years after Vietnam, and the 7.62x39 myth is still alive. Awesome!