help with 500 S&W

[Bullshop]

Got an order for 550 ct 500 S&W ammo but no gun as yet to test in. Would like to hear about powders primers velocitys. Is there an A#1 powder. Am working with a 440gn boolit MT Dan coppied for me from Corbon. The Corbon ammo did 1670 fps from the longer barrel Smith. It had a small grain extruded powder with yellowish color kinda like H-322. Anybody shooting one of these baheamith destroyers?
BIC/BS

[475/480]

Hi,
My go to powder is Surplus-WC680/AA1680,Some people like Lil'Gun or AA#9,I like WC680 because it fill's the case less chance of overcharge and still get FULL power


Sean