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serf 'rett · May 3, 2013, 06:16 PM

Take a look at UncleNick's post (#3) on this thread:

http://thefiringline.com/forums/showthread.php?t=523984

Some flat point bullet profiles will require different COAL than that found in a manual. Plus the COAL can be chamber/barrel specific if you are fine tuning your handloads. In my 9mm Springfield XDm, for example, I load Berry's 124 gr HBRNTP to a overall length of 1.150 inches; however, I load Berry's 124 gr HBFP at 1.070 inches. Both bullets are 124 grain. Both bullets are hollow back. However, the wider nose profile of the Flat Point Bullet will engage the lands at the 1.150 inches, used for the Round Nose Thick Plated bullet, causing the cartridge to headspace of the bullet instead of the cartridge mouth. I must seat the Flat Point bullets deeper to get my desired jump distance to the lands.

May 3, 2013, 06:16 PM	#5
serf 'rett Senior Member Join Date: June 25, 2009 Location: Stuttgart, AR Posts: 1,569	Take a look at UncleNick's post (#3) on this thread: http://thefiringline.com/forums/showthread.php?t=523984 Some flat point bullet profiles will require different COAL than that found in a manual. Plus the COAL can be chamber/barrel specific if you are fine tuning your handloads. In my 9mm Springfield XDm, for example, I load Berry's 124 gr HBRNTP to a overall length of 1.150 inches; however, I load Berry's 124 gr HBFP at 1.070 inches. Both bullets are 124 grain. Both bullets are hollow back. However, the wider nose profile of the Flat Point Bullet will engage the lands at the 1.150 inches, used for the Round Nose Thick Plated bullet, causing the cartridge to headspace of the bullet instead of the cartridge mouth. I must seat the Flat Point bullets deeper to get my desired jump distance to the lands. __________________ A lack of planning on your part does not necessarily constitute an emergency on my part.