Which model? There are several different sizes, magnification, reticles, and turrets. It looks like the 4x-12x is the biggest they go. My 10 yr old son has a Luepold 3-9 on his Tikka 223, and he's shot it out 400 yards. If the turrets are exposed, be careful they don't turn by rubbing on them or such, and dialing the turret when you don't want to.