Lyman data has a load of 37.3 gr IMR 4227 with 350 gr slugs. I use Berry's plated for this, also Rainier has a 335gr plated that's slightly cheaper. These are my current go to load for general range plinking and introducing friends to the 500.
Tried Trail Boss but it was a total let down. Very boring to turn a hand cannon into a BB gun.
My next midrange load development will be with CFE Black. Hodgdon's website has data for it. Supposed to be very accurate and clean burning at low to mid range pressure. Plus it's very safe as you can fill the case all the way up to compressed powder charge without getting high pressures. Impossible to double charge a case with this stuff like you can with the light pistol powders.
Tried Trail Boss but it was a total let down. Very boring to turn a hand cannon into a BB gun.
My next midrange load development will be with CFE Black. Hodgdon's website has data for it. Supposed to be very accurate and clean burning at low to mid range pressure. Plus it's very safe as you can fill the case all the way up to compressed powder charge without getting high pressures. Impossible to double charge a case with this stuff like you can with the light pistol powders.
