Issues with Bullet Seating for 7.62x54r

[Dairygold]

Ok. So, I am a relatively new reloader and something looks off about these new rounds I am making.

I have a large batch of 220 grain round nose 30 Cal projectiles I bought at a garage sale. I am using them on top of 45 grains of IMR 4350 and using PPU cases.

All cases were trimmed to length, then chambered and deburred.

When I seat the bullets to 2.8 OAL, the neck seems to develop a wave.

I am using RCBS dies on a Forster Co-ax

https://imgur.com/a/DtCVFVB

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[kcstott]

it appears that your seater die is also a crimp die. you need to check this and be sure you are not over crimping the case.
If that's not the issue you may want to chamfer the ID of the case a bit more.

[bigbossman]

it appears that your seater die is also a crimp die. you need to check this and be sure you are not over crimping the case.
If that's not the issue you may want to chamfer the ID of the case a bit more.

Yeah - back out the seating die, and then re-adjust the bullet seating stem. You are over-crimping and that is causing the issue. You don't really need a crimp on that, at all.

[baih777]

As others said.
Put a empty case in the press. Raise the case into the die.
When the case tops out in the die. Back the die half a turn at a time till the press handle is at full stroke.
Then at full stroke. Turn the die down till it hits the case. Then back die out half a turn.
If your going to crimp..then adjust die and bullet seat.
Alot of us dont crimp unless we have too.

[Dairygold]

Thank you everyone for the feedback. Worked great!


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[justMike]

I'm curious where you found loading data for 220 grain bullets for 54R? Don't think I've ever seen any yet.

[Dairygold]

I'm curious where you found loading data for 220 grain bullets for 54R? Don't think I've ever seen any yet.

It?s in the Sierra load manual. I?m trying to use up these 220?s, but I?m interested to see what the recoil is going to be like out of an M39.


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[hambam105]

The OP mentioned 30 cal bullets.

Now there are some Mosins with a 30 cal bore in circulation somewhere. However, I'd say there is about a 99.2% chance that a random Mosin bore is in .311.

1 plus vote for over-crimping.

[jsanch03]

What diameter are those 220?s? I?ve found some 200 grainers but they were .311 diameter. The diameter should not affect recoil but will affect accuracy. As far as felt recoil, if you?re shooting those out of an m39 it?ll be minimal. The m39 is built on a beefier platform compared to a standard 91/30.


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[Cowboy T]

Actually, I believe the 220gr bullet or something very similar was the original loading for the 7.62x54R, much like the .30-03 used when it first came out. They revised it to a 150-ish grain bullet after the Germans came out with the 8x57JS Mauser, same as we did with the .30-06.

My M39 has a 0.310" bore, and I believe that's the standard groove diameter for the M39. At least one Finn model uses 0.308 or 0.309 (is that the M27? it's been a while).

[rsrocket1]

Be very careful chambering those particular rounds in your rifle. You might not be able to close the bolt. See if you can hand slide the rounds into the chamber. If you can't, don't use any more force than light thumb pressure. If you can't pull the cartridge back out, use a cleaning rod from the muzzle to gently push it back out the chamber. Don't use the bolt.

[hambam105]

OP...There might be a handloader near you who can measure the diameter those bullets
to determine if these 220s match the bore diameter of your Mosin.

Knowing the diameter of those bullets and the over crimping shown in your picture are two different issues.
It's all about learning. Plenty dudes here willing to help.

[Dairygold]

OP...There might be a handloader near you who can measure the diameter those bullets
to determine if these 220s match the bore diameter of your Mosin.

Knowing the diameter of those bullets and the over crimping shown in your picture are two different issues.
It's all about learning. Plenty dudes here willing to help.

Ok, I fixed the crimping issues by setting up the die correctly. However I am confused about the issue with the projectile diameter. I?m just making plinking ammo so I plan to stay with .308 projectiles, even if my bore might slug at .310 or .311. I?m also staying low of the powder charge of 45 grains of IMR 4350.

Why wouldn?t these loads work? I?ve attached a picture of the projectiles and my load data from the Sierra manual.

Thank you for the help.

https://imgur.com/a/CBjMux3

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[hambam105]

Unless you have a really really really rare Mosin Nagant,

a .30 caliber bullet is the wrong diameter size bullet for your Mosin. Don't let the bullet weight confuse you.

Bullet diameter should match bore diameter. Your bullets are probably .30 cal while your bore diameter is .310.

I don't know this for a fact because I'm not there. But it's an educated guess. Just put the word out. ~"Can anyone near this zip code help me out with..."

[Dairygold]

Unless you have a really really really rare Mosin Nagant,

a .30 caliber bullet is the wrong diameter size bullet for your Mosin. Don't let the bullet weight confuse you.

Bullet diameter should match bore diameter. Your bullets are probably .30 cal while your bore diameter is .310.

I don't know this for a fact because I'm not there. But it's an educated guess. Just put the word out. ~"Can anyone near this zip code help me out with..."

Please clarify, wrong or unsafe?


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