I've been reloading 45-70 Gov't for quite a while (Cast w/Lube & Jacketed). Shoot em thru Ruger #3, Browning B78 & Remington Rolling Block. I've decided to try Powder Coated Cast Boolits. Just bought some 500 G from ACME (NOT the place Wile-E-Coyote gets his stuff). Looking for suggestions on Powders & Quantities. Don't wanna use Black Powder. Like to stay around 1200 FPS. Thanks for any & all Advice!