Over the weekend my oldest son cast 20 pounds worth of near as I can surmise pure lead into 311041.Two nights ago as I was setting up the lubrisizer for him to size I discovered that his bullets were much too soft to size and then it dawned on me that he started with a tin of 50 cal balls bought from a yard sale. Duh, muzzle loading balls are generally pure lead. As I'm pricing alternatives to harden his lead I'm starting to wonder if I would increase accuracy in matches with harder bullets. Currently I'm using wheel-weight alloy, near as I can figure.
Question is where is the evidence that harder is better? I'm interested in bullets that are lubed and gas-checked.