Is the .308 and the 7.62x51 the same round?

[JD Miller]

Saw a guy (range master)blow up a m1 Garand with his hot reloads long time ago when I worked at a rifle range.

Oh wait,,,, that was a 3006


.

[303tom]

Originally Posted by JD Miller

Saw a guy (range master)blow up a m1 Garand with his hot reloads long time ago when I worked at a rifle range.

Oh wait,,,, that was a 3006


.

How do you blow-up a M1 Garand with hot loads ? I seen em bend operating rods, but never seen one blow-up...............

[Pogo]

Originally Posted by 303tom

Yes they are the same !..............

No. They are similar just like the .223 and 5.56 are similar. But there is a difference.

There are differences in chamber specs and maximum pressures. The SAMMI/CIP maximum pressure for the .308 Win cartridge is 62,000 psi, while the 7.62×51 max is 50,000 psi. Also, the headspace is slightly different. The .308 Win “Go Gauge” is 1.630″ vs. 1.635″ for the 7.62×51. The .308′s “No-Go” dimension is 1.634″ vs. 1.6405″ for a 7.62×51 “No Go” gauge. That said, it is normally fine to shoot quality 7.62×51 NATO ammo in a gun chambered for the .308 Winchester (though not all NATO ammo is identical). Clint McKee of Fulton Armory notes: “Nobody makes 7.62mm (NATO) ammo that isn’t to the .308 ‘headspace’ dimension spec. So 7.62mm ammo fits nicely into .308 chambers, as a rule.” You CAN encounter problems going the other way, however. A commercial .308 Win round can exceed the max rated pressure for the 7.62×51. So, you should avoid putting full-power .308 Win rounds into military surplus rifles that have been designed for 50,000 psi max.

[303tom]

Chambers are slightly different, the rounds are the same, it`s the chambers that make the pressure difference`s !.......... I have a friend that works at Lake City & he says the only difference`s is the head stamps & the bullets................