What with a cold winter, rainy weather and a knee replacement this winter, I've had too much time to think and that can be dangerous and expensive.
I'm about to sit down and write Pat Marlin and run this idea by him on making a custom set of PB check dies for me, His extra effort would be minimal.
I want to make a gas check with a domed, convex bottom to it. Understanding I'd have to modify my sizing die plunger to the same profile or it would end up flat. The dome would be about 1/16" deep.
Here's my thinking. Install check and load cartridge. When fired, the pressure would collapse the dome and apply pressure sideways to give a tighter bullet to bore fit. Should give better fit.
Lee bottom punches could be easily modified as well as those for he Lyman and RCBS. Stars should be no problem as is.
What do you guys think? Comments solicited./beagle