With modern Drop-Compensating scopes, an Anti-Cant Indicator is a necessity.
Wheeler Engineering Anti-Cant Indicator, Pic Rail Indicates precise, repeatable level gun position Increases accuracy by insuring proper gun alignment Easy-to-view from shooting position Attaches to any Pic Rail and aligns with precision-leveling set screw Folds in when not in use Precision machined aluminum with anodized finish Keeping your scope perfectly aligned is critical to long-range accuracy. If your gun isn't aligned correctly dialing up the turrets or using hold-over marks, will just throw your shot off.