seroadglide,

What you say is valid. Lots of BP English double have bad / rusted / pitted bores.

I supposed I have got to the stage that I only look at bores which are good +.

I had an I Hollis that the bores looked like new - mirror bright. The Damascus on
the barrels was also in excellent condition.

Black Powder seems to ATTRACT moisture which is why I think they corroded so quickly
if not cleaned.

500 Nitro