Help with SIG P226 - Shooting Low DA

[Snapshot]

I was practicing with my P226 today and the shots fired DA were consistently 3-4" low - SA shots were more or less grouped near the point of aim.

All shots were fired standing, two handed grip (left is strong) with the same ammunition (Winchester 9mm 147gr TMJ), target and other circumstances; range was 15 yards.

The gun is a CPO, no mods, fixed sights; I have no reason to believe there is anything wrong with it, but I have only had it for a month or so.

Likely I am doing something wrong (yanking it down?) firing DA but other than "aiming high" when shooting DA I can't figure out how to correct it. As best I can tell I am not changing grip between DA and SA shots.

Any (helpful) suggestions?

Snapshot

 

[USP]

maybe get a snap cap and work on being more smooth with the cursed DA trigger... I use to do the same with my DA..took abit of practice...

 

[helicopterbase]

that is a common problem with brand new sig's.

you just have to shoot it. after 2000 rounds, the triger mechanism will smoothen up. if you don't want to wait till 200 rounds of service, have a gunsmith to smoothen it up.