Sam1911
Moderator Emeritus
You know, a really good way to start out with that revolver would be using IMR's TrailBoss universal load system. (http://www.imrpowder.com/PDF/Trail-Boss-data.pdf)
You'd get a pleasant-shooting load (probably about on par with a warm .45 Colt) that the big BFR would soak up nicely and you could easily put 100+ through in a sitting. (And which would certainly kill a deer or black bear deader than dead.)
Then, if you really need to, you could work your way up with some other mild loads until you find the line between "OK" and "NOT OK."
You'd get a pleasant-shooting load (probably about on par with a warm .45 Colt) that the big BFR would soak up nicely and you could easily put 100+ through in a sitting. (And which would certainly kill a deer or black bear deader than dead.)
Then, if you really need to, you could work your way up with some other mild loads until you find the line between "OK" and "NOT OK."