Lyman’s 410459 is pretty close in design to the 429360. Never shot well until I got away from the “harder the better” mentality after re-reading Elmer Kieth. Soft bullets, about 20:1 alloy lots of soft lube (I recommend Ben’s Red) and usually .411 diameter for .41 Magnum and .431 for .44 Mag/Special. They work at low and maximum velocity. At maximum they are the best long range plinkers. Like any mold cast, shoot, experiment before letting it go. It might be a jewel.