The seating depth and internal volume becomes more important the hotter the load.
Since it's hard to tell pressures, the safest approach is to load bullets long and with moderate powder amounts.
There's other causes of high pressures, too, like too much crimp and too long of bullets that are tight against the rifling without any jump from case to barrel.
Lock the doors, they're coming in the windows.
Last edited by g.willikers; January 22, 2013 at 07:37 PM.