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243winxb · October 7, 2012, 10:51 AM

What you are doing is not expanding the case neck in the proper manor. Your bullet has become the expander, opening the case neck. This works at times, till the bullet seating stem leaves a ring on the bullet. It may take to much pressure to push the bullet into the undersize neck.

October 7, 2012, 10:51 AM	#10
243winxb Senior Member Join Date: July 26, 2011 Location: USA Posts: 1,730	Bottle Neck Cartridge What you are doing is not expanding the case neck in the proper manor. Your bullet has become the expander, opening the case neck. This works at times, till the bullet seating stem leaves a ring on the bullet. It may take to much pressure to push the bullet into the undersize neck. Last edited by 243winxb; October 7, 2012 at 04:14 PM.