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m&p45acp10+1 · October 19, 2012, 05:02 PM

If it were me. I would first try screwing the die down a bit more first. Then after sizing I would check the length to see if they need to be trimmed. I would also make sure the seating die is not screwed too far down creating a crimp that makes them hard to chamber. Also I would check the COL so assure you are not pusing the bullet into the lands.

If all of those are done, and the results of the measurements are withing normal limits. I would guess that the brass is springing back. Anneling may help in that case. Though new brass would not be a bad idea.

October 19, 2012, 05:02 PM	#7
m&p45acp10+1 Senior Member Join Date: May 3, 2009 Location: Central Texas Posts: 3,930	If it were me. I would first try screwing the die down a bit more first. Then after sizing I would check the length to see if they need to be trimmed. I would also make sure the seating die is not screwed too far down creating a crimp that makes them hard to chamber. Also I would check the COL so assure you are not pusing the bullet into the lands. If all of those are done, and the results of the measurements are withing normal limits. I would guess that the brass is springing back. Anneling may help in that case. Though new brass would not be a bad idea. __________________ No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.