# CCI Mini-Mag .22 LR 40 Grain CPRN: Failure Pattern Analysis in Rimfire Systems When rimfire malfunctions occur, CCI Mini-Mag .22 LR 40 Grain CPRN is often used as a diagnostic reference load due to its consistent performance profile. By establishing a baseline of expected reliability, shooters can better identify whether issues are mechanical or ammunition-related. Common fail... https://bulkammotogo.com/product/22-lr-40-gr-cprn-cci-mini-mag-0030-5000-rounds/