I've been reloading for 20+ years now and have never crimped a single round. I go through about 200 rounds of 9mm a week and never had a problem and have AR's in 223, 6.5 Grendel, as well as a 458 socom. So far I've never had a problem or seen an issue with any rounds removed from a magazine after shooting part of the mag. Am I missing something by not crimping all this time?