Glocked. Is a term for brass often times fired out of a glock . Often times there is a bulge at the base from the chamber not fully supporting the brass. I've seen it but have no idea if said brass was fired from a glock. If I run 500 rounds I check primers and cases case gage etc for all 500. I keep the split brass etc on the top shelf of the bench as a reminder. Honestly reloading is more for accuracy after time is factored in.