# CCI Mini-Mag .22 LR 40 Grain CPRN: Cleaning, Maintenance Impact, and Long-Term Firearm Wear Considerations CCI Mini-Mag .22 LR 40 Grain CPRN is frequently selected not only for its reliability, but also for the way it interacts with firearms over time. In high-volume rimfire shooting, maintenance burden and long-term wear are important considerations, particularly for shooters ru... https://bulkammotogo.com/product/22-lr-40-gr-cprn-cci-mini-mag-0030-5000-rounds/