Eric,
Actually that first W&C Scott had been converted from a 10 to a 12 when I purchased it. I liked it and decided to get other old 10s for the same purpose. All of them, except one, had damascus barrels. That just about ruled out using modern loads, and especially steel. Along with that a 10 with ducks over decoys is a bit of an overkill. Back in the lead days I used my old Ithaca 3 1/2 10, but largely for pass shooting. And I used the 2 7/8 shell with number 4s rather than the 3 1/2. The damascus barrels were replaced with steel ones. I was able to use 2 3/4 shells in those guns, which are about the only size I use for ducks. But I had the 3 inch chamber for geese if needed. I had all those guns choked for modified, so zero problem shooting steel. I got enjoyment from taking old 10 bores that were all but impossible to use, and return them to the field once again. For example I have another W&C Scott, the Premier Grade (with knockout engravings of game birds) that was made in 1882. When I take it out I spend more time looking at it than looking for ducks. As I said before, I get a lot of enjoyment at looking at and using old guns. Best, Worth