I recently made a deal on an 1873 in .45 Colt that I plan to use to get into Wild Bunch and also as a black powder rifle.  I've never loaded black powder and only shot it a few times.  This may open a can of worms, but I would like to hear from the BP shooters on this.   If a shooter is using .45 Colt and has the following priorities (in order) what is the best BP substitute?   1. Can not be corrosive 2. Good smoke 3. Minimal fouling 4. Low recoil 5. Easy