It just seems to me that a substance such as black powder, which detonates, should cause far higher pressures than a substance such as smokeless powder which burns at a predetermined rate. BP is classified as an explosive while smokeless is classified as a flammable... I don't get it. If I put 110 grains in a 54 cal rifle and seat a 230 grain ball on it and touch it off everythings great, but if I were to pour in 110 grains of Bullseye..... KABLOOIE! So why is BP (an explosive) so much less powerful than smokeless powder (a flammable)?