So today I went and bought my first Glock. I got a Glock 23 Gen 4. I also was taking my M&P 45 and Sig P250 9mm out at well. I am constantly shooting high and to the right with my M&P 45 AND my Glock. With I shoot my Sig, in dead on target and there are no issues. I also own and M&P shield and I have the same problem with it. Any answers?