Which minie are you using Tim? The Lyman 577611 (i think it is) 530 grain with the thicker skirt and conical cavity works best in my Musketoon. (I would add that I use a .575 sizing die). Much better than the minies that I've used in 2 & 3 bands which I didn't have much luck with in the musketoon. The musketoon has different rifling from memory and obviously with the short barrel is not going to have much in common with the longer rifles. 55g of swiss no4has always worked for me. This is the gun that I enjoy shooting the most.

Steve.