Bought a rifled 1842 Springfield reproduction .69 rifled musket 'bout 20 years ago in the remote chance , it might shoot Lyman .69 cal. minies . The Lyman minie's were too small. So , not to be deterred , I found a small shop in Virginia , that machined and rifled the correct .69 cal. rifling in a "drop-in " Springfield barrel. Success. The rifle is one of my prize possessions. It is accurate to a fault , and extremely fun to send the bigger than life .69 Lyman minie balls down range. A low velocity minie of that size makes a distinctive "hissing" sound in flight accompanied by a distinctive slap when it strikes meat. Had to install a taller , slightly thicker front sight on the front barrel band , so it would be better for my old eyes to shoot at 100 yards. ............oldwood