I’m eyeballing a semi-local revolver (I’ve seen pictures.) It appears to be a Hand Ejector 2nd Model originally built for the Brits chambered for the .455 MK II. It has the correct British markings.
It has been rechambered to .45 Colt.
Before making the drive to check it out, I’m wondering what I might expect to find so far as groove and throat diameter.
What I’ve read about the .455 cartridge indicates a bullet diameter of .455, which makes me suspect dimensions would be on the generous side.
Since this would be strictly a shooter, I’m not interested if there’s little chance of it being accurate.