that has happen to me in the past I also had rifles do just the opposite the rifle would shoot 2in at 100yrds and shoot 2in at 400 same ammo I figured the bullets settle down at longer range (sorry got a little off topic)anyway when your problem happen to me it was a creepy and heavy trigger it shot fine for me up close but farther out It started showing up I herd some say howa trigger can be a little heavy but opinions are like butholes