I was at the range today checking some new loads for a .44 spl and noticed for about the 500th time in my life that the point of impact moves in the strangest ways as loads change. Going up in charge makes the group rise at 25 yds and drop at 7. Changing from LSWC to LRN of the same weight moves the point up and to the left. Does anyone have a good predictive sense of how load changes effect the point of impact? Frankly I'm pretty sure each of my guns acts a little differently. I am shooting offhand only (no rest) and my groups aren't bad. From shooting session to shooting session the same load seems to hit pretty close to the same place.