A lot of guys, including some who hunt with us are using Pyrodex or the new 777 in their hunting rifles. My son-in-law has lost 3 elk over the years because his gun went "click" instead of "bang." The people getting reliability with these powders I think are using it in BP cartridge rifles or in muzzle loaders using 209 (shotgun) primers. Those primers are illegal for muzzle loading hunting rifles in the western states, you are stuck using musket caps. Musket caps WILL set off black powder reliably. So that's what we use.

jn