I recently purchased a new Ruger American Compact pistol. I've put about 500 rounds through it and am struggling to hit a paper target at 15 yards. I can come close to the bullseye at 5, but there's no consistency to the shots. I've had other Rugers, and they've all been very accurate. Generally I look to the operator before blaming the pistol, but I'm getting pretty frustrated with it. Thoughts?