Engineered for the .22 Long Rifle, the Prostaff Rimfire II offers a reticle designed specifically for the trajectory of hyper-velocity rounds. BDC 150 Reticle was developed specifically for the trajectory of hyper-velocity .22 Long Rifle Rimfire round, the BDC 150 reticle offers shooters unique open circle aiming points from 50 to 150 yards.