I have been loading .357 magnums for my blackhawk 10.4 grs of 2400 with a 158 gr cast swc great performer.+ or -1140 fps good accuracy.When I load them in my Rossi(20in carbine) the accuracy is all over the place even at 50 yds I have shot 158gr jhp with the same load
and have good accuracy.do I need to jack up the load for the cast bullets to get them to settle in and what about leading with the higher velocity