The Firing Line Forums - View Single Post - An update on my extraction problems (45ACP)

maillemaker · March 3, 2011, 07:59 AM

Thanks for the reply.

I will have to measure my OAL, but I'm pretty sure I have room not to seat it as deeply and leave the shoulder standing proud.

Currently I have been seating the shoulder flush with the case mouth as I did not want the cartridge to try and headspace on the bullet shoulder.

Lee suggested crimping the case mouth over the shoulder. When I pointed out that I'm already crimping at .469 (Lyman lists case mouth diamter is .473), and crimping it over the bullet shoulder might cause headspace problems, they said that many semi-automatics headspace on the extractor and that it would be OK. I'm skeptical.

He also suggested not seating as deeply and using the top lube groove as a cannilure and to crimp the case mouth into that. Again I'm worried about headspacing.

I don't know why they make these bullets with a shoulder at all. Lee said they did it because otherwise the ogive of the bullet might engage the rifling during chambering, but isn't this what the bullet shoulder is going to do anyway?

Steve

March 3, 2011, 07:59 AM	#4
maillemaker Senior Member Join Date: August 30, 2010 Posts: 1,635	Thanks for the reply. I will have to measure my OAL, but I'm pretty sure I have room not to seat it as deeply and leave the shoulder standing proud. Currently I have been seating the shoulder flush with the case mouth as I did not want the cartridge to try and headspace on the bullet shoulder. Lee suggested crimping the case mouth over the shoulder. When I pointed out that I'm already crimping at .469 (Lyman lists case mouth diamter is .473), and crimping it over the bullet shoulder might cause headspace problems, they said that many semi-automatics headspace on the extractor and that it would be OK. I'm skeptical. He also suggested not seating as deeply and using the top lube groove as a cannilure and to crimp the case mouth into that. Again I'm worried about headspacing. I don't know why they make these bullets with a shoulder at all. Lee said they did it because otherwise the ogive of the bullet might engage the rifling during chambering, but isn't this what the bullet shoulder is going to do anyway? Steve