Just bought some used brass,threw away the badly dinged ones...lots of them .. theyv'e been sized/deprimed,in checking the overall lengths they are .030 shorter than trim-to length.:huh: since I'll be shooting them in a single shot rifle I may just sort them into batches for experimentation.Keep the ones that group,etc. so my ?? is..do .223/.5.56 brass vary this freaking much ? In my thinking,plus or minus .005 is acceptable for plinking ammo,plus or minus .030 just isn't. your thoughts ??