.30 carbine crimp question

[HighPowerShooter]

The buldge is normal... as for your 'gap' you want to remove the belling completely... so your 2nd pic shows the correct crimp.

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[Litt'le Lee]

Just because you have carbide dies,,you still need lube !!,,only straight wall brass requires no lube..not using lube will result in head seperation,,speaking from experience

[macgunner01]

thanks for the responses, guys

highpowershooter: i'll definitely go with the crimp used on the right casing, then. thanks for the advice!

Litt'le Lee: i most certainly still use lube when sizing the cases. i use the dillon spray lube, lube up a bunch of cases, and every second or third casing put into the dies is a lubed case.

[Larry Gibson]

thanks for the responses, guys

highpowershooter: i'll definitely go with the crimp used on the right casing, then. thanks for the advice!

Litt'le Lee: i most certainly still use lube when sizing the cases. i use the dillon spray lube, lube up a bunch of cases, and every second or third casing put into the dies is a lubed case.

You really need to quit crimping the case mouths. The >30 Carbine headspaces on the case mouth and absolutely no crimp is required. If you do anything simple taper crimp to straighten and remove the case mouth flare. You are asking for some serious misfires in eithe and M1 Carbine or a Ruger BH.

Also the bulge below the base of the bullet is caused because the case is sized too much. It is called the "coke bottle effect". If you don't want it then simple back out the FL carbide die a little at a time until it goes away.

Larry Gibson

[macgunner01]

Thank you for your reply, Larry!

You really need to quit crimping the case mouths. The >30 Carbine headspaces on the case mouth and absolutely no crimp is required. If you do anything simple taper crimp to straighten and remove the case mouth flare. You are asking for some serious misfires in eithe and M1 Carbine or a Ruger BH.

I definitely know about not crimping the bullet into place. My only question was how much of a taper is sufficient (because of explicitly not wanting to apply too much taper). The RCBS dies have a taper crimp die, and the most I'd ever apply is just to straighten the case belling.

Also the bulge below the base of the bullet is caused because the case is sized too much. It is called the "coke bottle effect". If you don't want it then simple back out the FL carbide die a little at a time until it goes away.

Larry Gibson

That is a great piece of info to know! I will definitely keep that in mind! A case suffering from the "coke bottle effect" is still safe to shoot though, correct?

[USSR]

A case suffering from the "coke bottle effect" is still safe to shoot though, correct?

Correct.

Don