I love the anecdote.What a nice little rifle. good luck with the sale. I had many friends in the UK that had old rook rifles, I understand that their period of practical use was relatively short as the real task of rook shooting was quickly taken over by .22lr in the 1900's.
I was lucky enough to do a lot of rook shooting in my younger years in the UK, mainly for large estates across Staffordshire, Derbyshire and Shropshire. Some of the estates had very large rookeries. Culling of "branchers" was a lot of work and often involved more than 500 plus rounds of Eley subsonic hollow point .22lr a day! I typically shot with a friend and he would use a similar amount of ammunition. The hit rate with a scoped bolt action .22lr is typically very high, birds literally rained down for hours, we would often collect some of the young rooks for elder country village residents who enjoyed them and to donate to country pubs and restaurants that would serve traditional game dishes. I heard many stories how during the second world war, every bird was collected and eaten amongst local country villages!
There were many mid May days that involved lying or sitting in the bluebell woods clearing tree by tree. We used to get out the ordinance survey maps and work out the safe direction to shoot with the estate owner to prevent the risk of a bullet coming down in any populated area which was at best typically small villages, most estates were big enough areas to not have any real concern with .22lr subsonic ammunition being used at an angle typically 70 to 80 degrees from the ground. You also thought about the risk of shooting straight up, as what goes up must come down! It truly was an interesting sport and task. In the end this was just a method of controlling rook numbers, there were always plenty of rooks around no matter how many branchers were shot and rookeries stayed very active for decades if not more.
For a number of years that these .300 caliber rook rifles were actively used they must of got through some serious quantity of ammunition back in the day!
I was surprised to learn that brancher (juvinille) rooks were considered good table fare by the Brits. I have had crow before, even though there is lots of British folklore about it tasting terrible. It was a delicious red meat, so surely a younger and smaller Corvid like a rook would be even better.
From what I understand, the Rook Rifles were a clever name alliteration, but they were used predominantly for hares and rabbits as a very lethal 80-90gr thirty caliber bullet would anchor game for the pot with good authority. They also used them for Fox and similar sized animals.
The neatest thing about the rifle is its scale. It has a full length stock and a generous 26.5" barrel so its not a toy, but every part on the rifle is so diminutive and equally proportioned that to carry it all day would be a pleasure.
Even two modern bespoke firearms of the same model are not like a Model 870 coming off an assembly line. Each part on such a gun is carefully hand fitted. The good news is as