The Lancaster oval bore out of the Italian auction turned out to be a 500/450 3.25", so I will be hunting down more 416/500 brass, as that seems to be the only option here in the USA right now for 3.25" brass based on a 500 parent case. I might have a few left from the only other time I bought those (as donor cases for a 500/450 No1 Express.)

The rifle suffered a hit in transit that shattered the butt plate. That wasn't original, and appears to be only the black plastic portion of a Silvers-type recoil pad. The soft part of the pad isn't there at all. A small split to wood occurred at the widows peak of the recoil pad, but that should be easy to repair as it is clean and the chipped piece is there.

Looks to be a very nice rifle with some honest miles on it.