The Rifle Scope Ruler XL makes it easy to sight in a rifle with as little as one shot. It eliminates guesswork and complicated calculations, and can save a great deal of expensive ammunition. Just place the ruler on the target after your first shot or group and use the ruler to measure from the bullet holes to the bullseye, for a direct readout of how many clicks to adjust the reticle for windage (left or right) and elevation (up or down). At 9.5 x 2", the XL ruler is large enough to measure shots that miss by as much as 8".
Designed for 1/4, 1/8, and 1/2 MOA turret scopes and calibrated with scales for 25, 50, 100, and 200 yards, the Rifle Scope Ruler XL works with modern rifles, muzzleloaders, scoped pistols, scoped crossbows, and scoped air rifles.