Smokless loads for .43 Mauser & 45-70?

I make 43 Mauser from 45/70 brass or more recently Starline 45/90 brass.

390gr Cast from RCBS Mold

28.0 gr SR4759 - 1350 fps
33.0 gr H4198 - 1350 fps

500gr Cast from Lee Mold

26.0 gr SR4759 - 1100 fps
31.0 gr H4198 - 1100 fps.
 
.45-70 : 16.5 grains of Unique pushing a Bullet Barn 405 grain LRNFP triple lube groove bullet with a gas check comes in at about 1,280 fps in my Shilo Sharps #3 Sporting Rifle.
 
My favourite target load for '86 Win .45-70, 405gr. 457193 cast soft, 20.0 gra SR4759, any pistol primer, goes about 1100fps, shoots under 2" with iron sights and old eyes.
 
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