Lapua Center-X .22 LR Ammunition Versatility and superb perfomance Lapua's Center-X gives you the confidence of high quality .22 long rifle match ammunition. This ammo is widely used by rimfire enthusiasts around the world. Lapua's Center-X is a versatile .22 LR cartridge known for its superb performance. Ballistic coefficients are calculated by Quick Target Unlimited Lapua Edition from V0 to V75 BC G1 for all rimfire .22 LR bullets = 0.172 Caliber: .22 LR BC G1: 0.172 Bullet Weight: 2.59 G (40 gr) Purpose: Target Product No.: 420163 Box Count: 50