by ICIL36GM » 24 Feb 2024, 7:36 am
Just flicked onto your posts re Nobel 60. Great powder and available into the 70s till it was replaced by the 78 and 80 series. I still use 78 but because the data on the tin was designed for ribbed cases and monowads, there's a bit of fiddling to suit compression formed ages. Start low! Re 20ga. Not an easy transition and 82 and 84 works better. Best thing to do is trade for another 36gm suitable powder. It seems most 36gm powders can adapt well to 20ga while maintaining safe pressures. APS 450 for one.