I cast some 500 gr .457" bullet for my Sharps replica using a 50/50 mix of wheel weights and pure lead. Ron, in a PM, told me that they would likely be still too hard for shooting out of a ML.
He wasn't lying. I shot them yesterday up at our camp. The brass was loaded with 70 gr (volume) of Goex FFg. I only fired a couple because I had the wrong insert n the front globe sight and couldn't see the target that well. But after going up to the target I noticed a couple bullet holes in the tree about 15 feet behind the target and before the embankment. I went over to examine it and fount that the 500 gr bullet passed completely through the center of a 10" red maple and embedded out of sight into another behind the first one with no sign of expansion. I did take a nice chunk out of the backside of the first tree.
This could be and elephant / dinosaur load out of the sharps!!!
I guess I have to soften it up even more. Maybe I'll only add 20% wheel weights instead of 50%.