XD sights are ultra tight. You will mar your finish if you try to remove them with a punch, and you'll need a steel punch to do it. I changed my sights out to night sights and it is a pain in the arse. I'll never do it again. Its best to send it off and have springfield do it if you want to install new ones; but I think you were just trying to move the rear, right?
Chances are is that your problem caused by your hand. Guns don't change trajectory like that just because you move back a few yards. Try a vice type bench rest and different ammo and see if keeps doing what you've said. - before giving up on it.
Chances are is that your problem caused by your hand. Guns don't change trajectory like that just because you move back a few yards. Try a vice type bench rest and different ammo and see if keeps doing what you've said. - before giving up on it.