Just a question here from someone still learning about English guns. What would the significance be today, for a potential buyer, of nitro proofs, with 2 1/2" chambers? Would the buyer be willing to shoot heavier loads in it if it had nitro proofs? I would think not. Was there a difference between the payloads of BP proof and NP ?
I was told by Cyril Adams, when I began my search for an English or Prussian hammer pigeon gun, to look for heavy nitro proofs ................ 1 1/4 oz. or higher. I could understand that, for someone wanting to shoot 1 1/4 oz. loads.