a .700 nitro express
There's the .700 Nitro Express.
It indicates that the rifle was proof tested at the Birmingham England Proof House. bnp is Birmingam Nitro Proof (nitro means smokeless gunpowder)
no answer but i have a king nitro 22. long rifle used in WWI/WWII has no information it took quite a hit in the chamber though it was handed down to me from my great grandfather.
Any rifle chambered for that cartridge. Most will be custom made double rifles.
It does not.
50-500 usd
700 Nitro, 600 Nitro, 505 Gibbs, 375 H&H Magnum, 460 Weatherby,
Not the first double rifle (they have been around since muzzle loading days) but the first "Nitro Express" was created by Rigby in 1898 as the .450 Nitro Express. This used the newly created cordite propellant in lieu of black powder (that is the nitro part of the name). There was soon after several variants and other companies created their own versions.
When you cock the rifle it compresses the gas behind a piston just like a spring. Basically it replaces the spring.
I think large, heavy, expensive, custom made double barreled rifle. To the best of my knowledge, there was one handgun made in .600 Nitro Express, more as a curiousity than a usable handgun.
No, the .600 Nitro Express is more powerful. Also, there is a .700 Nitro Express round that is designed for a rifle, but there is one handgun that will fire it.