Make sure your shooting base is solid, not moving at all. If your good on that, try taping your scope at its adjustment screws. I simply use the empty shell, and tap the adjusters a couple times. It seats the lenses. Then try couple more shots. If your sure on all that, then most def. try some other ammo. I've had rifles that just wouldn't shoot a certain ammo well, while others with the same exact gun have no problems with that same ammo.