I went on a bison hunt with a browning 1885 Highwall in .45-70. The guide was dismayed when he found out that I was shooting a 405 grain hard cast lead bullet over Goex Ffg black powder. He was highly skeptical, and voiced his opinion several times. After an extensive stalk on hands and knees, we got within 120 yards of a bull. I took the shot with iron sights. The bullet thwacked the hide and sent a cloud of dust flying. The bull stood motionless for a couple of seconds, then wobbled, and fell over dead. The guide was stupefied. The rifle shot MOA or better with iron sights out to 200 yards, as long as I replaced the commercial lube on the cast bullets with SPG lube. The commercial lube did not react well at all with black powder, and would not shoot worth a darn.