I was firing my .30-06 the other day at the range and someone else was firing a .30-06 as well. He doesn't reload, so he gave me his 20 fired brass cases, manufactured by Herter's. I immediately noticed that the primer looks different than what I am used to, and appears to be much more flush with the base of the case. I sized one round and the primer did not pop out. I had to remove the shell holder and punch out the bulge created by the die in order to get it out of the shell holder. Needless to say, I did not size the next round in my dies and risk ruining my dies. Is the primer in Herter's cases integral with the case so that it cannot be removed and the shell reloaded?