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Colorado4Wheel · 08-31-2012, 20:50

10mm has slightly thicker case so it is possible to swage the bullet and reduce neck tension in the process. I measured it with my FCD. Also Lee's basically instructions for the FCD lead to too much crimp. So you do have that as a possibility. Especially if you did the "add a complete turn" thing.

08-31-2012, 20:50	#104
Colorado4Wheel Senior Member Join Date: Nov 2006 Location: CO Posts: 12,582	10mm has slightly thicker case so it is possible to swage the bullet and reduce neck tension in the process. I measured it with my FCD. Also Lee's basically instructions for the FCD lead to too much crimp. So you do have that as a possibility. Especially if you did the "add a complete turn" thing. __________________ Steve Yes, I post using a phone so my spelling sucks. Converting Hornady owners to Dillon one owner at a time.