The Firing Line Forums - View Single Post - Cartridge Resizing .223 to 300 Blackout/300 Whisper

DeadCenter · April 9, 2013, 07:49 PM

Something I did when doing the initial resize was to run it through the resizing die twice, one cycle, turn the case 1/3 to a 1/2 a turn and give it another pull. I found sometimes just doing it once didn't seem to set the shoulder back far enough, or just didn't get a good form on it and the bolt wouldn't close. But after the double resize, never a problem.

April 9, 2013, 07:49 PM	#7
DeadCenter Senior Member Join Date: September 17, 2006 Posts: 105	Something I did when doing the initial resize was to run it through the resizing die twice, one cycle, turn the case 1/3 to a 1/2 a turn and give it another pull. I found sometimes just doing it once didn't seem to set the shoulder back far enough, or just didn't get a good form on it and the bolt wouldn't close. But after the double resize, never a problem.