My pistols are a Pietta 1858 converted to .45 with Kirst Konverter and ejector rod, and the other is a Pietta 1860 converted to .45 with a Kirst "Saber River" engraved Konverter and ejector. Both I milled the loading channel in. The load is a 200 grain bullet over 5.5 grains of Trail Boss. Duplicates the .46 Rimfire the original 1858 NMA were converted to in 1869.
Besides shootingf clean with my new 1866 Carbine in .44-40, I shot clean with both the Remmy and 1860 also, and even got some bonus points hitting a 1 quart pop bottle on the 25 yards berm with the Remmy.