The Russian Mosin Nagant Forum

It seems to me that the only reason the mosin couldn't fire a standard NATO 7.62 is because it wouldn't eject the round since it doesn't have a rimmed cartridge. My question is, would it be possible to adapt the mosin for a rimless round? Maybe just by tinkering with the little hook that grabs the rim of the standard mosin round (forgot the name of that part). I only ask because we all know that surplus ammo cannot and will not last forever. And when it finally runs out I don't want to pay out the ass for new 7.62x54r. Another reason is that, When the zombies come surplus ammo may be hard to find and especially here in Florida 7.62nato or 308's are more redily available.

Even if you get it to work, you will have a lot of bullets hitting the target sideways (keyholing). The diameter of .308 bullet is too small for Russian Mosins.

Isn't a 308 the same as a 7.62. And isn't a 7.62 NATO the same as a 7.62x54r?

Correct me if i'm wrong but .308 is the diameter of the bullet for the 7.62 nato and .311 is the diameter of the 7.62x54R. I'm thinking your not going to get alot of accuracy do that...

Ohh. Ok. I thought it was just a different type of measurement. Like inches and centimeters. So if 308 is the diameter if the NATO round and 311 is the Russian round. What does the 7.62 stand for. I always assumed it was the diameter of the round.

7.62 X 54R is .311 +/- a .308 is 7.62 X 51 or .308. But you alreadyknow that...........now.

hi every body
from what i have read and been told at my local gun store.
.308 and 7.62 are the same but slightly differ in diam.
.308 bullets or 30 cal are .308 i think
7.62 rounds are typicaly .310 to .312 diam.
my local gun store recamended some .311 for reloading
the only way to be sure is to slug your barrel and guage the slug

I've seen these 7.62 x 39mm rounds. What are they close to in caliber?

7.62x39 is .311 diamter bullet but i still refer to them as .30 caliber...

7.62x54r had s much fatter base than 7.62 NATO or the 30-06 it was derived from. Some mosins in the usa in the 20s/30s were converted to plentiful 30-06 by shortening the chamber a large amount to get it down to the 30-06s diameter, then the chamber was recut. This shortened the barrel shank so much that much of the front portion of the 30-06 case was actually located in part of the old bore where the barrel was much thinner. This makes them unsafe to shoot, a 7.62 NATO round would require the chamber to be even shorter. Plus the different bore sizes affecting accuracy.

I will confuse you even more, but 7.62x39 is .311, as is both .303 British and 7.7 Japanese. I'm not sure how they came up with some of the numbers. Also, 7.35 Carcano is a true .300 caliber I think, not a .308 or something.

Stock up on the cheap surplus.....

When I die, my widow will have plenty for sale if I don't buy another round.

Learn to handload/reload ammo and be self-sufficient. It's fun and it will take you where you will never get shooting surplus ammo. If you don't handload you are missing out on half of the fun.

1934hexreceiver wrote:Isn't a 308 the same as a 7.62. And isn't a 7.62 NATO the same as a 7.62x54r?

Life is rarely that simple.

Some of the confusion results from how the different bores used to be measured. Here in the U.S. our military tend to measure from groove to groove, while most European militaries measured land to land. That's how you end up with .303 British (7.7x56r) using a .311 bullet, 7.62x54r and x39 using the same, 7.5x55 Swiss a .308, 7.92x57 a .323, etc., etc., while U.S. designed rounds like the 7.62x51or .308 Win uses a .308, 30-06 or 7.62x63 also uses a .308. With commercial cartridges this doesn't really apply, since the designer usually is the one naming it and can and will use basically anything he wants.
One additional note on the 7.62x54r. The measurement of that round originally used an archaic Russian system of measurement of lines, one line being app. 1/10". When the Soviets went to the metric system it didn't translate exactly and became 7.62.

Some Mosins were rechambered for .30-06, they did it by cutting back the barrel at the breech and redrilling the new chamber deeper into the barrel making what was often a dangerous piece of shit as this placed the chamber in a thinner part of the barrel.

I would not listen anybody telling you to fire 762 nato in a mosin.
I think the 7.7 jap is listed as a .310 and also some x39 bullets are .310.
you can get 303 bullets in 311 and 312 and the
7.35 is .300. some more.
7.5 swiss is .308
7.5 french is .308
8mm hunn is .330
8mm mauser is 323
lebel is 323
6.5 carcano is .268

May I suggest that the O/P either get a reloading manual with illustrations of the cartridges or look at a cartridge display. You will see the great variation in cases including length, taper (or not) shoulder etc. I mean a "30 M1 carbine" and a ".300 Whisper" and a ".300 Wheatherby" are all .30's right?

Junk Yard Dog wrote:Some Mosins were rechambered for .30-06, they did it by cutting back the barrel at the breech and redrilling the new chamber deeper into the barrel making what was often a dangerous piece of shit as this placed the chamber in a thinner part of the barrel.

Adding to this is the fact that these rechambered in 30:06 rifles were done with the old lighter load for the 30:06 and not the current modern heavier load and you can get into trouble real fast. There are lighter load modern 30:06 loads avilable today and they will keep you safer. They are refered to as lighter recoil loads andf can be found if you look around. The Bannerman sporters were remade for a 30:06 lighter load in sporter configuration and I have shot a couple of those over the years with no problem. There were also a bunch of back yard gunsmith specials that tried to do the same thing and that really can be a deadly on both ends rifle! Shooter beware for sure! Bill

US military spec M2 ball is a lighter loaded .30-06, this is why we recommend it for use in the Garand. The old '03 bolt rifle can handle any modern .30-06 just fine, but the Garand was tuned for a specific load, and can batter itself with a steady diet of the heavy stuff if an adjustable gas plug is not installed. I have a serious lack of faith in any of the converted Mosins.