talking to Henry Kranks today, the guy on the phone mentioned they are only proofed for BP and not pyrodex or 777

he also said that certain makes are known to develop certain faults using anything but BP, like twisted frame, damaged forcing cone etc

also said invalidates warranty, and using anything than BP you need to load by volume NOT weight

bit of a mine field it seems

what are you guys doing? And any problems found, if anything it'll be a .44

oh yes, we can't use BP in our indoor range anyway, so it'll have to be one of the others