Kuduae

A very interesting point about the proof marks, my Gibbs Farquharson was rebarrelled (or re- bored?) to .500 Express by W. Jeffrey in the 1890s, I believe. It certainly looks strong enough and looks similar to Nitro express rifles to have been made for the nitro cartridge, despite having BP proof marks.

I think I would still use BP just in case!

TH44