The one we had the best results from was the 440 grain in our 45-70s. Any of them were good from 380 to 500, but the 440 give the best cavitation along with superb penetration at the velocities that were most sensible. As with any custom made mold you can have almost any weight you'd like, but a 440 grain .458" with a Wide-Flat Nose LBT profile and gas check base was wonderful, requiring no modification to the Marlin rifles or any single shot we used them in. It gave MOA accuracy with the loads the single shots liked, and around 1.2 to 1.4 MOA from most Marlins. Some did even better.

Contact Veral if you want a mold.
(208) 267 3588
LBTisAccuracygmail.com