I shoot six Remingtons, five Parkers, and an English SxS, all damascus. The Brits still proff damascus guns today, so I don't believe for a momount the acid flux crap. Over the years I've used PB, 700X, 800X, Red Dot, Solo 1000, Nitro 100, Promo, and Clay Dot for low pressure shells [ anything around 7000psi or under ]. Only problem was when I thought I was loading Pyrodex and used 94grs of PB - according to Tom they were 24,000psi. Not good. But that was 5 or 6 years ago and now I have one s. stage press for smoke. My early 12ga Parker hammerguns have bores at .745, which was pretty much the standard back then. The Parker 10 hammergun is at .800. But they all have such heavy breechs I don't worry. Paul