RE: SMOKELESS POWDER COMPARED TO BLACK POWDER?
You can't even compare the two. One reason, is blackpowder burn rate is totaly different loose and under pressure. Two, you have to pick out the smokeless powder. Some cowboy bulleye loads are like 10gr. My heavy hunting loads are 51gr of IMR4198. Its just impossible to compare the two. There are like 25 suitable powders or much more for a 45-70. different sizes, and burn rates.