Dan- I know this thread is about pickets, but I had a .50 Bauska barrel with 38" twist, about .008" deep rifling, maybe .010" - memory on that is dim. I shot Tc maxiballs in it along with bulelts, hollowbased and solid from a Lyman .500" HB mould that was obsolete when I came across it. Originally, as a HB design being fired in a 38" (rather slow) twist, I felt it needed more weight in the butt, so I trimmed back the plunger on my poor-man's lathe - an electric drill held in a bench vise and used files. Did a lot of that, back in the 70's. The resulting bullet'e weight came up, but so did it's accuracy. This bullet as well as the TC maxi-ball, lubed with Crisco (what else in those days), and pre-engraved in a short section of barrel, both shot into 1" to 1 1/4" groups off the bags. I could just hold a 100/100 score on our 3-position 100 yard targets, off double bags - at 100yards. I had only open sights I think, but may have had a Lyman-type tang mounted peep. I do remember buying one once, but don't remember using it. Anyway, those bullets would shoot well in the .50's 38" twist of course, shot naked, but needed pre-engraving for a mechanical fit once I wanted to shoot them.