Free: Contests & Raffles.
I'm anxious to see how the Seifts work for you. My 460 always shot best at max charges with the 395gr hardcast loads. Dumping 40+ grains of H110 into any case takes some getting used to. It just seems like so much! it's one of the reasons I replaced my 460 with a 45-70 BFR, so that I had more powder options to get the same performance.
45 grains of H110, a 240gr hp...big kaboom. 5 loaded, safely test fired.