CCI Mini-Mag .22 LR 40 Grain CPRN: Integration in Mixed Caliber Training Programs In mixed-caliber training environments, .22 LR is often used as a low-recoil platform for skill development before transitioning to centerfire firearms. CCI Mini-Mag .22 LR 40 Grain CPRN is frequently used in this role due to its reliability and consistent behavior. Its stable cycling allows traine... https://bulkammotogo.com/product/22-lr-40-gr-cprn-cci-mini-mag-0030-5000-rounds/