I haven't tried the first two you mentioned, but I have gone through about 3 lbs of 300MP in 44 Mag, 45 Colt and 357 Maximum. It performs very much like 296/H110, but it requires about one grain more powder to equal fps from 296, but it seems to do so with less pressure. 296 seems to max out before 300MP. Accuracy and extreme spread are very good, and it measures well. 300MP performs extremely well in the 357 Maximum with 180 grain jacketed bullets. I'm getting 50-75 fps higher than 296 with equal groups at 50 yards from a Ruger revolver.