I suspect the Remington brass is thicker, and that is why it lasted longer. The problem I mentioned with the 7-08 brass in the earlier post was with some new bulk Remington brass I purchased. I bought 40, and about 6 if the first loaded rounds would not go off. Just a slight ding in the primer, but no bang. This happened with 2 different brands of primers. Never had a problem if the brass was previously loaded since it was fireformed in the chamber. I had a gun smith check out the chamber and firing pin extrusion- the gun was fine. I mentioned this later to the guy at the gun shop I bought it from, and he said one of his buddies had also had problems with the brass. The dimensions were not right. I have never had a problem with new Winchester factory loads, or new Federal brass- just this batch of Remington bulk brass. I just dont trust it unless I have fired it once in the rifle. I think this was around 1994, not that recent.