I know I should order a Pat Marlin GC maker in 40 val but for now I have some 45 copper GC's in hand. I installed them the base of 121 40 cal bullets. I used a .401 push through die. The GC's are firmly in place on the bullets. The GC's bulged out the bass of the GC. The extra metal had to go somewhere. Any guess as to how effective these GX's will be? I intend to shoot the bullets one at a time through my GP-100.
This project is the result of me experiencing leading in the first 1/4" of rifling. I also intend to cast some more bullets just using alloy form WW air cooled rather than water quenching them as has been my practice to date with the 40 cal. Up until now I have had no leading in my 40cal pistols using water quenched WW alloyed water quenched bullets but the revolver is a different animal.
Take Care
Bob