I have a really nice condition pattern 1917 Enfield in 30-06. I was at the range today and I noticed that a few of the primers appeared to be popping out of the casing a little bit, maybe one or two hundredths of an inch. This did not happen with every cartridge, and on some it popped more than others. I have fired the gun plenty of times before and nothing bad has happened. I did notice before that the primers looked a little weird but never payed attention to it until now. I was using Hornady brass with 45gr of Varget behind a 150gr FMJ. This load has no issues when fired in my M1. I am guessing this is an issue with headspace. I have read before that Endfields can have really loose chambers. Is this normal? Do you think I can keep shooting the gun? Also is there anything that can be done about it? I would not be willing to get it rebarreled since everything is original and really nice.