Pyre602 Posted August 15, 2006 Share Posted August 15, 2006 (edited) I'm starting to reload on a sdb and have a question about setting the crimp die. I'm reloading mg 115grn bullets, which I think are .355 for 38 super comp. I've got the crimp set to .379. How can I tell if I'm over or under crimping? Thanks in advance. Edited August 15, 2006 by Pyre602 Link to comment Share on other sites More sharing options...
HSMITH Posted August 15, 2006 Share Posted August 15, 2006 Take the bullet diameter and add the thickness of the brass at the casemouth times two. Say the brass is .010" thick, times two is .020", plus .355" makes a measurement target of .375". Any less will increase the chance of a case hanging up and the gun jamming, any more and accuracy can start to degrade pretty quickly as well as increased chances of setback. Link to comment Share on other sites More sharing options...
Pyre602 Posted August 16, 2006 Author Share Posted August 16, 2006 Thanks for the answer. It seems that the crimp that was set from the factory is where its supposed to be. I'll bring a load out to the range and see how it goes. Link to comment Share on other sites More sharing options...
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