30 Carbine Case Bulge Near Head

[browningautorifle]

you can't make them to short

What I think he was trying to say was don't under length trim them. I used an RCBS trim die and then they were all the same all the time. They all went through it every time, came out all the same. That sure helped, along with FL resizing. I had no problems then.

[Parashooter]

. . . For subsequent loading's, I will run the cases into the full length sizer measure the case length, and adjust the die depth until that 1.285" dimension is reached then stop. My cases still have enough tension to hold the projectile firmly.

Unless I'm mis-reading, this appears to advocate partial sizing. If so, that's not generally a great idea for self-loading arms. Should an over-large case stall while chambering, an out-of-battery "slamfire" may occur. Complete F-L sizing can help prevent this rare but serious consequence.

[browningautorifle]

this appears to advocate partial sizing.

Seems to. I'd FL resize too, never had any problems that way and bullet retention was always correct.

[TDH]

What I think he was trying to say was don't under length trim them..

That's what I meant to say

[cipherk98]

Thanks for the advice everyone. I went and finished up my run this morning and they look great but won't get a chance to shoot it, it's been pretty windy here so my range trip today was just for defensive pistol practice. I hope to go out and verify my 8mm load in Mausers (about a month in the making) at the same time too.

[M94/14]

Unless I'm mis-reading, this appears to advocate partial sizing. If so, that's not generally a great idea for self-loading arms. Should an over-large case stall while chambering, an out-of-battery "slamfire" may occur. Complete F-L sizing can help prevent this rare but serious consequence.

Yeah, now that I think of it, not the best advice to have given a new handloader. I can get away with that procedure because my sizing die is a bit on the small side. The O.P.'s die may not be.

[browningautorifle]

I've had friends bring me ammo that wouldn't hold the bullet and they blamed the brass. I have no idea what they'd done wrong, dies, sizing practice...but when I FL sized the brass in my RCBS dies, they all worked. It's just a better practice I find. As you say, dies may be different...

[USGI]

Yeah, now that I think of it, not the best advice to have given a new handloader. I can get away with that procedure because my sizing die is a bit on the small side. The O.P.'s die may not be.

With your dies, is the benefit of your "procedure" that, as long as the cases are all from the same lot and fired from the same chamber, the rest of the cases won't need checked for length after sizing? I can see where that might work. I just went out to the shop and checked a bunch of "emptys" of various headstamps and fired from two different carbines. I found case lengths to be anywhere from 1.273" to 1.296" - a lot of variation, but when I picked out a few that I know were from the same lot and fired from my own carbine, they were fairly uniform in length. I can see where you might save a lot of effort on the resizing with that method too; those tapered cases can take a lot of force to FL resize. - Bob

[browningautorifle]

The force is negligible with a press. You don't feel it, or you shouldn't. Cases stretch at different rates, they expand and when sized down in diameter the metal has to go somewhere so they get longer. I found the pressure involved in the firing, as a light v/s heavy load would have effect on stretch and swell... Therefore would have effect on how much they stretch, or need trimmed. They ALL need checked EVERY time.

[Brian Dick]

Something I learned about loading .30 M1 that has paid off in both reliability and accuracy is to invest in a taper crimp die and use it religiously. I've been reloading for the Carbine using WW296 and 100 -110 grain projectiles with great success for more years than I care to admit.