I'm needing some imput on a STEEL load i'm wanting to start reloading but can't find the right powder. The load is for a 12 gauge. It calls For these components Remington 3" hulls,38.5 grains of steel powder,fed209A primer,B.P. TPS wad,a 20 gauge undershot fiber wad. The velocity is about 1590. I'd like to change out the powder since i cant get it up here in MT and keep the velocity close to this load as possible. I have all the other components needed for this load.THANKS for any help on this.