JaPaK
JaPaK
2 posts
Joined December 2016

seating/crimping die combo

I am using and RCBS seating and crimping die combo. The brass is caving on the upstroke. The seating adjustment on the die is all the was down with zero adjustment remaining. It seems the die should be longer so that I do not have to set the crimp so low on the brass because it looks like it is crimping to low and pulling on the brass on the upstroke causing it to cave. The brass basically has a dip in the mid section. The rounds are not cambering as well as they should. I have tried range brass as well as new brass.

Is there a different seating & crimping die combo?
JaPaK
JaPaK
2 posts
Joined December 2016

RE: seating/crimping die combo

...or am I doing something wrong? Do I need to make adjustments somewhere?
Bucolic_Buffalo
Bucolic_Buffalo
64 posts
Joined June 2016

RE: seating/crimping die combo

I do my seating and crimping in two separate steps. To do it in one step requires very critical adjustments.
narnar
narnar
1 post
Joined October 2013

RE: seating/crimping die combo

I think rcbs 480r seat/crimp isnt long enough to crimp in the 550