Sam and Jake Hawken had a 1-48 twist rifling machine...Seems their rifles had a pretty good reputation...

One other point...My 54 has a 1-72 twist, my .40 has a 1-48 twist, both are round ball guns with cut rifling...

I've found the sweet spot for may guys that had factory sidelocks, they would all shoot as well as open sights would allow...Some just took a little more work than others...