With a max load like our talking about, and the conicals you just mentioned in your other thread.
About like a H&H .375 mag. Maybe more.
Not really needed. I'll be shooting a 250 gr bullet with 80 gr of BH 209 for elk this year.
Last year I killed a cow elk with a .54 round ball and 80 gr of Swiss black powder.
I like to get close though. To me that's part of hunting, but especially ML hunting. (for me)