Hey Cayugad, try sizing those Lees to .451 or .452 and shooting them with regular sabots. I haven't played with them a lot yet, but did try a few of the 340 grain Lees sized to .451 in three different sabots - two over 80 grains (weight)T7 and one over 80 grains volume GOEX. They didn't do great at 50 yards, but showed enough promise to try with different loads and powders. I also want to try the 340's sized to .452 and the420's sized to .451 and .452. So many things to try - so little time at the range.