For those interested in this round's ballistics, the following listings came from 2 sources of data for the noted rifle, ie: Hodgdon 2004 Manual and Big Bore Rifles and Ctgs. by Wolf Publishing.
: 435gr. Lead FN at 2,089fps for 4,215 ft. lbs.
: 450gr. Barnes FN at 1,940fps for 3,974 ft. lbs.
: 485gr, LTB FN at 2,009fps for 4,341ft. lbs.
: 525gr. Lyman FN at 1,852fps for 3,995ft. lbs.
: 600gr. A-Square at 1,739fps, for 4,032ft. lbs.
: Pretty good showing for a lever gun with a 2.1" case.
: My own .50 Alaskan, made up on a Remington Rolling block, modern Italian action with a McGowen 24" twist barrel was used mostly with BP loads and some few smokeless heavy loads comparable to the 450gr. listed. This 28" #5 barrel, with both smokeless and Black Powder loads, shot into 1 1/2" at both 100 and 200 meters using a tang sight and with Sheard gold bead front sight. Good accuracy with .50 cal. punch.