realitycheck,
A friend of mine in Texas has a British .500 BPE double and has used it with no problems on both Cape and water buffalo, using cast bullets and black-powder equivalent loads with smokeless. I am sure he would share his loads if you by chance luck into a rifle like that.
i have an old bp 12 double,i measured my bore at .70,so, im going to be loading 730 grain .69 cal slugs starting out at 100 grains bp and im going to work up as close as i can to 200 grains of ffg. i might even try using fff powder to see what that does. you think that would handle grizzlies(or lions)?
