RE: S&W M&P vs. Glock
I had a similar problem with the Glock...it pointed down and a little to the left.
When I was competeing it was the police style stuff...right, left, over barricade, standing, 25 and 50 yd. Pistol and Rifle were pretty much the same for rifle except for the distances. Things have changed alot since then. I was on the AF TAC SP Marksmanship Team (Tactical Security Police ). I won 1ST place for the TAC competition and then competed in the WorldWide Championships in 1980...Dang, I'm getting old!! LOL
I did look at the XD...didn't really like it...kind of top heavy and blocky.