I cast my 370 grain maxi balls with pure soft lead, and sort them by weight to eliminate bullets with air voids. I did try some of the 350 grain factory maxi-hunters in two TC rifles. My home cast will shoot clover leafs at 50 yds. The factory cast bullets shot about 2 inches at that range. My partner and I have probably taken about 40 deer with the 370 grain and never recoved a bullet. IMO, expansion with maxi is minimal.
