Thanks for all the info.Now I know why I never had any problems with not checking overall case length when reloading for my AR.Last time I reloaded was back in the 80's before all the surplus hit the market.I do have a case length gage.I just wanted to see if the longer case would chamber in a 556 barrel.I will be checking oal and case trimming from now on to be on the safe side.It's amazing how much safer we get with age.Thanks again.