I have noticed that expensive, well made rifles shoot ammo with less variation that cheaper ones. My 77-22 is a bit more accurate than my 10-22, but if I were to take the best groups from the 10-22 and the worst ones from the 77-22, you would think the 10-22 was a better rifle. The variation for the 77-22 is about 5/8 inch to 1 3/4 inches, while for the 10-22 it is 1 1/4 inches to 4 inches.