Quick

poline · May 6, 2011, 12:51 PM

I know this issue has been talked about, before, but I can't remember what the answer was!

I'm loading 38spl 158 gain rnfp jacketed bullets and the brass is buckling, being crushed, when I apply the crimp. Can anyone tell me what I'm doing wrong and how I can prevent this?

Many thanks in advance!!!!!!

Twinsig · May 6, 2011, 01:06 PM

assuming you are applying a roll-crimp sounds like your die is set too low/too much crimp. take a look at the instructions for your die set-up.

Doodlebugger45 · May 6, 2011, 01:32 PM

Presumably your bullet has a cannelure. And presumably the bullets are being seated so that the mouth of the brass falls into that cannelure. If so, then the only other problem is that you are trying to apply too much crimp. You don't say whether you are using the seating die or a factory crimp die to apply the crimp. In either case, you need to back the die out to where it is just barely touching the mouth and then adjust it down in 1/4 turns at a time until you start to apply the roll crimp. It doesn't take much of a crimp to be effectivel

poline · May 6, 2011, 02:34 PM

I set the die up again, per instructions, no more damage brass. It was to much crimp with the seating die. I'm not useing the Lee factory crimp.

Thank you, very much.

May 6, 2011, 12:51 PM	#1
poline Senior Member Join Date: January 27, 2009 Location: Richmond,Va Posts: 292	Quick I know this issue has been talked about, before, but I can't remember what the answer was! I'm loading 38spl 158 gain rnfp jacketed bullets and the brass is buckling, being crushed, when I apply the crimp. Can anyone tell me what I'm doing wrong and how I can prevent this? Many thanks in advance!!!!!!

May 6, 2011, 01:06 PM	#2
Twinsig Senior Member Join Date: January 30, 2009 Location: East Alabama Posts: 235	assuming you are applying a roll-crimp sounds like your die is set too low/too much crimp. take a look at the instructions for your die set-up. __________________ I also have Fire Extinguishers, hope I never need those either.

May 6, 2011, 01:32 PM	#3
Doodlebugger45 Senior Member Join Date: April 15, 2009 Location: Wyoming Posts: 1,717	Presumably your bullet has a cannelure. And presumably the bullets are being seated so that the mouth of the brass falls into that cannelure. If so, then the only other problem is that you are trying to apply too much crimp. You don't say whether you are using the seating die or a factory crimp die to apply the crimp. In either case, you need to back the die out to where it is just barely touching the mouth and then adjust it down in 1/4 turns at a time until you start to apply the roll crimp. It doesn't take much of a crimp to be effectivel

May 6, 2011, 02:34 PM	#4
poline Senior Member Join Date: January 27, 2009 Location: Richmond,Va Posts: 292	I set the die up again, per instructions, no more damage brass. It was to much crimp with the seating die. I'm not useing the Lee factory crimp. Thank you, very much.