I have one with both the 28" and 24" 1/28 twist barrels for it. I shoot 100 grains of Goex 2f and a 300 grains xtp in a short black mmp sabot in the longer barrel; the carbine barrel is sighted in with the 250 grain xtp, same sabot with 90 grains of 2f. Both will do 2" at 100 yards. The barrels are a bit large for conicals and Power Belts though but yours may be tight fitting enough for them; just have to try them and see. I have been told the Hornady Great Plains bullets shoot real well with a mmp sub-base under them; I have the stuff just have not tried it yet. The Great Plains 385 hp's will do around 4" at 100 yards but you will have to push them with 100 grains of 2f to get the accuracy; with the sub-base I may be able to cut it back some and still get good accuracy-we will see.

I am going to get some Gold dots and Swiss 2f to try out soon. These are great little flintlocks. I have also shot some Barnes 245 spitfires and the accuracy was very good as well but they need 1100 f.p.s. to open and that's about what they are running at 100 yards with Goex black.The Gold dots look like just the ticket for real black velocity and I imagine they will shoot as good as the Hornady stuff. I am going to order some Gold Dots in .452 250/300 grainers and some .429 210 grainers as well. I will keep you posted on how they do. Almost anything in a sabot is good out of these barrels but mmp's are the only ones I have tried.