i am an avid shooter and the owner of many different handguns but for some reason i have great results with everything i own except for my xd 9mm service. i just can shoot this gun. every single time i go to the range with the xd all my shots seem to be low right, about the four o'clock position . when i shoot any of my other guns they hit where i put the sight and group well. whats going on? i am a left handed shooter and have tried grip, trigger finger position and everything else i can think of or find online. along with the xd i also shoot a colt model 80 .38 super, eaa witness .40 and a glock .40 cal. i really dont want to part with my xd but it has not worked out for me as yet. any and all help will be greatly appreciated.