Hey guys picked up an xd 40 with a 4" barrel. Shooting Tula ammo, for some reason when I fire it it hits low, about 5:00, I switch to my girlfriends shield and it basically hits where I point. I'm not a professional. I've shot 200 rounds through it so far. Am I compensating the recoil? I don't want to change sights until I'm certain it's not just my own fault. Anyone else have any problems like this?