The Firing Line Forums - View Single Post - Inconclusive load work-up?

leadchucker · January 15, 2013, 02:07 PM

All the stuff I've read says that seating depth, which affects internal volume, which affects chamber pressure, is important. I have been trying to keep the seating depth on all my reloads as close as possible the seating depth of another similar documented load.

And yet, the consensus here and on other forums seems to be that getting the bullet as close as possible to the riflings is more important. (and of course making sure the round fits in the mag, and feeds okay.)

So should I forget about trying to get the seating depth so close to a reference, and instead pay more attention to the COAL and rifling clearance? How much difference in pressure would thirty or forty thousandths difference in seating depth make?

January 15, 2013, 02:07 PM	#5
leadchucker Senior Member Join Date: March 5, 2011 Location: NC Posts: 252	All the stuff I've read says that seating depth, which affects internal volume, which affects chamber pressure, is important. I have been trying to keep the seating depth on all my reloads as close as possible the seating depth of another similar documented load. And yet, the consensus here and on other forums seems to be that getting the bullet as close as possible to the riflings is more important. (and of course making sure the round fits in the mag, and feeds okay.) So should I forget about trying to get the seating depth so close to a reference, and instead pay more attention to the COAL and rifling clearance? How much difference in pressure would thirty or forty thousandths difference in seating depth make? __________________ JOIN THE NRA!