Let,s talk cast bullets NOT AMMO!

[Fly]

Try finding specs on bullets not ammo. I had to come to you guys. I ordered a .312 bullet mold 160 grain for my mosin nagant. I have been trying
to find out the difference in bullet length between 7.62x54r & 7.62x39 bullet length. I know the dia are the same. But is the length of the bullet the
same or different. Lee does not show the length of bullets there molds drop.

Fly[smilie=b:

[Dan Cash]

go to: accuratemold.com and search his catalogue. He lists some bullets as designed for the two different cartridges with detailed drawings and specs for each bullet. The 150+ grain bullet for the X54R cartridge will be significantly longer than the 123 grain bullet for the X39 cartridge.

[Minerat]

Depending on the weight of the bullet, one might be able to compare it with known moulds. The constant is the 7.62 diameter, so the length of a 180 gr 7.62x39 should be fairly close to a 180 gr 7.62x34 or a lyman 311407 allowing for the nose design.

[Fly]

Well the mold was to be here today, but look like tomorrow. I saw where so say they used this bullet in a mosin.
But looking at a 7.62x54r shell next to a 7.62x39 military it looks like the bullet my be short to get the over all length.
We will see when it comes in. If not I can always use it in my SKS I guess.

Fly

[fcvan]

I bought the Lee C312-155 2R for use in 300 BO, sizing it to .310 diameter. When I started powder coating I found that the nose profile became problematic with the BO. I have a neighbor who shoots an SKS and the boolit works quite well for the 7.62X39 cartridge.

Recently, I was gifted a 7.62x53 Argentine Mauser and I intend to use the Lee mold for that cartridge. Although I have heard many use the Lee C311-185 1R in 7.62x54R I have no personal experience with loading that cartridge. When I get dies for the Mauser I will use the 155 2R but may break down and purchase a 185 or 200 grain mold. It will either be a Lee or an NOE mold and likely with a RF profile.

[tomme boy]

It will work fine in the 54r as long as it is large enough in diameter. You need at least one bullet diameter of length still in the case. Basically it needs to be 0.312" of length from the base of the bullet in the case.

Chamber the round and see if it sticks in the throat. If it does not then leave it right there. If it does then start seating a little at a time deeper till it chambers without jamming into the throat. Bullets seated out to far can get real dangerous real fast so don't try to reach the lands on these old guns. They have a throat that is really long to make sure they will feed any 54R rounds out there.

[RU shooter]

Well the mold was to be here today, but look like tomorrow. I saw where so say they used this bullet in a mosin.
But looking at a 7.62x54r shell next to a 7.62x39 military it looks like the bullet my be short to get the over all length.
We will see when it comes in. If not I can always use it in my SKS I guess.

Fly
If your referring to the Lee 155/160 .312 bullet they work fine in the 54R , Thy may be a tad short oal comparing it to a heavier bullet but they fed and shot great in my M39, on the flip side the Lee 185 also works good in the little x39 in the sks and ak rifles

[sundog]

I bought the Lee C312-155 2R for use in 300 BO, sizing it to .310 diameter. When I started powder coating I found that the nose profile became problematic with the BO. I have a neighbor who shoots an SKS and the boolit works quite well for the 7.62X39 cartridge.

fcvan, I've run into the same problem with several 30 cal AR-15 barrels when powder coating. Nose sizing would work I guess, but that just adds another step. I have found that both the RCBS 7.62-135-SPL and NOE 311-152-SP alleviate that nose profile problem when PCing. So far, I am liking the RCBS boolit quite a lot. Need more shooting on the NOE. Feed/function is good for both in AR-15s tested.

[ShooterAZ]

Hopefully the .312 diameter will cast large enough for your Mosin Nagant. The boolits for my MN needs to be sized at least .314 or it will lead the barrel like no other.

[Fly]

Hopefully the .312 diameter will cast large enough for your Mosin Nagant. The boolits for my MN needs to be sized at least .314 or it will lead the barrel like no other.
Yes I slugged the barrel & she is .311. You guys are the best. This is the best site for info. Other sites you get BS & it is hard to sift threw for good info.
Thank you guys. If you ever want to make Real Black Powder come over to the muzzle loader threads & I can help you there.

Fly

[Fly]

My mold came in, C.312-155-2 & checking bullet length is .963. 7.62x56r case length is 2.114. The bullet length in Lee book calls
for 3.037. I checked my surplus ammo & it is 3.010, .027 short of Lee spec's. Fine so I go with surplus 3.010. Here is where the math
using this mold bullet falls way short. With a case length of 2.114 x bullet length .963 = 3.077? that only gives me .067 to seat the bullet?
That means I,m seating the bullet on the gas check. People all over the net are using these molds.

You know there not seating on only the gas check. So what length are they making there shells. The real question is what head space they
are shooting with?
Some one PLEASE HELP! Fly

[Muddydogs]

My mold came in, C.312-155-2 & checking bullet length is .963. 7.62x56r case length is 2.114. The bullet length in Lee book calls
for 3.037. I checked my surplus ammo & it is 3.010, .027 short of Lee spec's. Fine so I go with surplus 3.010. Here is where the math
using this mold bullet falls way short. With a case length of 2.114 x bullet length .963 = 3.077? that only gives me .067 to seat the bullet?
That means I,m seating the bullet on the gas check. People all over the net are using these molds.

You know there not seating on only the gas check. So what length are they making there shells. The real question is what head space they
are shooting with?
Some one PLEASE HELP! Fly

Seems you are getting hung up on bullet length and OAL for no reason. Cast the bullet and load them so there is a caliber in the case then shoot them assuming that the OAL is not pushing the bullet into lands but from your measurements it doesn't seem like it will. Don't worry about the bullet jump until you shoot a few and see what you get for accuracy. The bullet length in the Lee book is just the length that they used that worked in there test firearm or barrel and has no real bearing on what you are shooting, heck even if you had the same barrel that Lee used to test with your barrel might have a longer or shorter throat.

[Fly]

OK Muddydog What would be a sale depth to seat into case. My problem is I don't have a clue to how deep to seat bullet.
I know 1/16 of a inch is way to shallow.

Fly

[Harter66]

Fly I tend to agree . I think your over thinking this .
The Lee book OAL will be for a jacketed bullet , Lee and Lyman both use test data from others , just cut and paste .
The important part is that the loaded cartridge will fit in the magazine with preferably a full diameter inside the case but keep the gas check above the bottom of the neck . Once in the mag , does it feed ? If so then tweak to get land clearance and work up a load . The 312-155 I'm told was designed for the x39 but it's very serviceable in 30-30 (bolt or single fed) , 308 , and 06' hopefully as good in a 7.7 Arisaka .

Remember I'm the guy with the Savage 06' that can't reach the lands , and a 308 that won't shoot any tried to date bullet over 175 gr .

[ulav8r]

2.114 + .963 -.311 = 2.766 overall length as a starting point.

[Fly]

OK I will give it a try. What did we do before the internet????????????

Thank all of you Fly