I've got a couple of old 10 hammer guns both have been reproofed for Nitro...4 tons pressure and 1 & 1/2oz. of shot and marked 3 & 1/2".
One is Damascus the othere is Fluid/sleeved.
Both are in top condition and might hold up to a modern 10 shell but I'd rather not take the chance on wrecking something.
I've been shooting black powder in the one and I may just continue to do so...but in the Fluid steel gun I'd like to shoot some low pressure Nitro with good velosity to be used hunting.
I tried a search on here and came up emty handed.
Thanks