Blackhorn 209 powder is a great powder. Hard to find in my neck of Wisconsin though. Also it comes in a 10 ounce jug instead of by the pound. It is a very powerful powder, and clean burning. Also it takes a 209 ignition to set it off. So if you have a side lock, forget it. Even an inline with #11 or musket cap ignition, you should not use BlackHorn 209.l

Also the design of the rifle makes a difference. Open breech rifles and blackhorn 209 can be a little dangerous. For instance, when I was shooting BlackHorn out of a Black Diamond, it blew out the 209 primer in the open breech and part of the primer struck me in the fore head. It is made for a close breech style rifle, like the Triumph, Omega, Accura, Genesis, etc..

As for the Hornady FPB's they shoot well out of a fast twist rifle. Some rifles, they are kind of hard to load, but once you get them down the barrel they seem to load fine.

Welcome to the forum.