Cartridge Identification

[ChristianPatriot]

I've got a 30 cal cartridge that I'm trying to identify.
Bullet: .308"
Case diameter: .454" @ the shoulder, .485" @ the rim
Rim diameter: .568"
COAL: 3.013"
Head stamp has a 90 @ 12 o'clock and 3 @ 6 o'clock or it could be flipped over, 3 @ the 12 and 06 @ the 6.
Any ideas?

 

[ChristianPatriot]

.308 Winchester on the right for reference

 

[neraph]

7.62x54r

 

[ChristianPatriot]

7.62x54r

thanks!

 

[DoggyDaddy]

If it's 7.62x54R, the bullet should be .311, not .308.

 

[indiucky]

If it's 7.62x54R, the bullet should be .311, not .308.

Commies using commie calipers....No surprise there....

 

[DoggyDaddy]

Commies using commie calipers....No surprise there....

Well the commies aren't the only ones that don't know how to measure. British .303 bullets are also .311.

 

[calcot7]

So in conclusion.... .308, .303 and .311 are all the same.

 

[two70]

Well the commies aren't the only ones that don't know how to measure. British .303 bullets are also .311.

The Brits measure bore diameter on the lands not in the grooves (or bullet diameter), so the measurement is correct, they are just measuring something completely different for some reason that makes sense only to Brits.

With 7.62x54R, the bullet and bore diameter varies from .308 to .312 with Finnish rifles and ammo tending more toward .308 and Russian rifles tending to be closer to .312.

 

[DoggyDaddy]

The Brits measure bore diameter on the lands not in the grooves (or bullet diameter), so the measurement is correct, they are just measuring something completely different for some reason that makes sense only to Brits.

With 7.62x54R, the bullet and bore diameter varies from .308 to .312 with Finnish rifles and ammo tending more toward .308 and Russian rifles tending to be closer to .312.

Aha! This makes more sense I guess. I'd never heard it explained before. To add another touch of confusion, when Indonesia converted some 6.5x53R Dutch rifles to .303, they marked them as 7.7.

 

[AmmoManAaron]

Aha! This makes more sense I guess. I'd never heard it explained before. To add another touch of confusion, when Indonesia converted some 6.5x53R Dutch rifles to .303, they marked them as 7.7.

Yep. 7.7x56R is the seldom used metric designation for .303 British. I have some 1980s South African ammo that is marked that way on the boxes.

 

[DoggyDaddy]

Yep. 7.7x56R is the seldom used metric designation for .303 British. I have some 1980s South African ammo that is marked that way on the boxes.

I've learned something else new today! Thanks!

 

[Tombs]

So in conclusion.... .308, .303 and .311 are all the same.

No? They're all called 7.62, since 7.62 is a measurement from the lands of the bore. The bore diameters are matched to the bullet diameter, but the lands are usually spot on 7.62. Thus they're all referred to as 7.62.

.308= 7.82mm
.311=7.9mm
.312= 7.92mm

Same reason we call a .224" bullet a 5.56. The bullet is actually 5.7mm but the land diameter in the bore is 5.56mm.

 

[dooshie]

we were taught the the Russians can and did shoot the nato 7.62 but we couldn't shoot the Russian 7.62

 

[amafrank]

we were taught the the Russians can and did shoot the nato 7.62 but we couldn't shoot the Russian 7.62

you were taught really really wrong. Won't work, never did and never will. common myth spread by who knows who......

Frank