I bought some of the Greek .303 British ammo that was available and brass looks pretty good but it really hammers the gun. Bolt is hard to cycle after each round, my reloads are intentionally a bit mild but I was wondering if something about this old ammo might be hotter due to deterioration.
Have heard that powder breaks down into finer grains which can create more pressure. I'm also seeing some case stretch at the head that I don't see with my own loads.
Giving some thought to just tearing them down to use the brass and bullets. Originally I bought the ammo because the price was actually cheaper than good brass. Lot of work to tear that much down (450 rounds) might have to get something to use other than the hammer style bullet puller.