Quote Originally Posted by Turnup View Post
No-one at my muzzle loading club who have tried conicals have had any success. The general view is that the twist rate suitable for a ball (typically 1 in 40") is just too low for a conical.

The Ruger Old Army has a 1:16 twist rate. Uberti have also gone to this now. Pietta and older BP revolvers have a 1:30 rate.