I have a rolling block I re-barreled to 32-40. The barrel on the 32-40 is from a new old stock 8mm German made machine gun barrel with .323" bore. I needed a die to lube and seat gas checks for my Lyman 323-470 mold. When I cast boolits (unknown salvaged alloy) with this mold they drop out at from .325 to .326". I copied some early Lyman dies (the ones with 4 thru-holes) and made a die with an inside diameter .324". The die looks good, but when I try to seat gas checks with it the pressure required on the handle makes me fearful the Lyman 45's handle will fail. I really have to lean on it! When I do, the boolit exits with obvious mooshed out grease grooves on one side. So I have a question. Do I need to increase the chamfer on the top of the die from what is (about 30 degrees to a depth of maybe .050") to something steeper and deeper? When I size the same boolits with no gas checks, they come out fine (.324") with no mooshed grease grooves. I plan to shoot black powder or low pressure smokeless loads to something in the neighborhood of 1200 to 1500 fps. I could use the boolit without a gas check but wonder if I want to use the boolit sizer for other 8mm loads what do I need to do to make it work?