A very interesting little Side-Lever Rook Rifle - 300 Long Shot caliber

Hello All,

In addition to Big-Bores. I also have a fondness for the little ones. I especially like the little Rook Rifles that were used by the British.

This one is a Mariette with Belgium proofs. It is a Side-Lever Take-Down rifle. This rifle shows very high quality having excellent workmanship. There is some remaining case color, and it has a Mint Bore.

It also has an ejector-assist mechanism. The pistol-grip stock has fine checkering, and it even has heel & toe plates with checkering in between. The chambering is an extremely rare 300 Long Shot caliber. I could not find any information about this cartridge any where, nor could I find any loading data. In order to shoot it, I had to contrive some from scratch and experiment. I did a chamber cast and made a drawing and had custom cases made by Rocky Mountain Cartridge Co..

As always, comments are welcome ...