I started shooting around 1956 with a damascus hammer gun & then progressed to a Damascus Greener BLE. Both these guns were badly pitted and were fed a diet of whatever cartridges were available. Never a hint of problem with either. Over the years since then I have owned & used a variety of Damascus guns from Belgian to Boss & Co, with age came the sense to check their proof status/have them reproofed and of course use the appropriate cartridges. Again never a hint of problem and that's after 50+ years shooting.