They arent a target gun; have you tried point 'n pull instinct shooting? Might just go pretty much where you are looking. Try a bunch of different ammo, too.
Also, sights are just a point of reference (yes, it would be nice if they all shot right to POA with the target sight picture, but.....) try holding the front blade above the horizontal plane of the rear top, still centered, of course, and find the sweet spot for the way you look and hold. You may need to crank the back down to get it repeatable. Then just practice makin' hits.