I've not been impressed with the jacketed bullets designed for the 45-70 out of a Cowboy Marlin with 26"bbl. Went with the RCBS 300 and 400, and the Lee PB that casts about 360 in my alloy of choice, which is pretty soft. I can push them over 2k, and they hit with surprising authority.

I belong on eroding granite, among the pines.