Re: armi 1842 .69 rifled musket
The original 1842s were built as smoothbores and then rifled to update them. These rifled muskets were designed to fire Minie balls (bullets) with hollow bases. You might want to try a larger round ball and a thinner patch. Good luck.
If a .58 round ball won't knock down your silhouettes, you may need to try to re-set those targets somewhat.
Gil Davis Tercenio
34th Battalion, Virginia Cavalry
Great, great grandson of Cpl Elijah S Davis, Co I, 6th Alabama Inf CSA