Wondering if anyone has experienced inconsistant groups with American Pioneer Powder? I shoot a 50cal encore with 100grs, APP with 250 grain Shock wave. First round at 50 yds was on, the second and third were way off, almost off the paper. Re-shot with 100 grs of pyrdex select pellets. The three shot group was on. I did use T/C boreb utter between rounds. Any ideas as to the inconsistant results? Thanks