I've used several 1 lb cans of H335 in both .45-70s and .458 Win Mags. One of the very best for 400 - 500s. And... it's a ball powder - meaning more usable space in the case than H4895 or other stick powders. Yep, 2000 fps is safely possible from 400 - 405s in an 1895 Marlin 22", and 2150 fps from a 24", .458 using that ball powder and 500s from a 24". Not theory, but I've done it multiple times. H4198 is also one of the best for lighter bullets. You can also check Hornady and Barnes.
Bob
www.bigbores.ca
