I have a fairly new cap n ball 1860 Colt, Pietta brand, that pretty new. Bought it last year. All the cap n ball revolvers I've had through out my life would accept a conical bullet meant for the 1858 Remington Army. It's a hollow base and looks more like a round nose semi wadcutter. It's not an original mould, it's a mould that Lyman use to catalogue. I shoot Triple Seven. Shooting a 23 grain load, I got 1051 fps over my chrono. The bullet weighs 151 grains. It shot an inch at 25 yards. To put this in power perspective my midrange load for my Model 19 S&W is the RCBS 150 grain SWC over top 6.0 grains of Unique. It wears a 4 inch barrel and that gives me 1000 fps on the button. Now that 1860 Colt load looks really good! No, it's now ways near max. In fact I started shooting that bullet today using my powder measure that I use with my Ruger Old Army. I didn't chrono it, but I can tell you it was stinging my hand! So I went to a smaller charge which doesn't appear to be so small huh? I believe my ROA measure is 30 grains and I will have to check that. Now shooting the Hornady swaged lead balls in the 1860 with that 30 grain load gives me high 900 hundreds. BP cap n balls revolvers are nothing to sneeze at.