I would gladly collect any and all rook rifles I could find--  so far I've had to satisfy the urge with a Westley Richards Martini Cadet (310cf).
They are excellent examples of the maker's art and few remain in shootable condition today.  I continue the search.

I have never seen the mark, Fazer. I have seen a couple of break action rifles in 300 Sherwood so some early 20th century customers thought it was a Rook cartridge. I do, however, agree that it is way over the top. I shoot mine (a Martini) a lot even though it is a difficult cartridge to load. The shallow taper on the case is effectively a morse taper and and can stick in the breach. Any small oversize section will cause the round to be impossible to chamber. I use a conventional three die set, but de-cap separately and the sequence is: re-cap, add powder, neck expand, seat and then full length re-size. My usual load is 10grn of Reloader 7. First time I used this rifle at Bisley, I won a 100yd off-hand competition with it.
Fred

Here are a couple of mine:

Bailey Bonehill 360No.5
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H&H 360 No.5 with some paper patched loads I made up.
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Webley '02
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W.W. Greener 310
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Wilkes 300
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Army & Navy 300
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Westley Richards Deeley Edge patent 320
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W.W. Greener 310 double
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oneatatime wrote on Aug 19^th, 2018 at 6:04pm:


Thanks!  It is a lovely rifle.
It had been rebored and chambered for 357 mag. when I bought it and I had John Todd engrave it for me. 
It really is a great little rifle.  One that will hopefully never leave the family.

Thanks to all of you for posting pics of your rook rifles. As one who has never had the pleasure of seeing one up close and personal it was a treat. Never see anything even remotely like that down here in Louisiana. And having said that my only two British 22rf's are a BSA model 12 or 12/15 I bought many years ago when I lived in NYC and a BSA 22rf barreled action I bought here on this forum. Thanks again,Frank

I've only gotten to fondle one of those round block 1902s but it could not hold a candle to yours. My 1902 is the large economy size.

Thanks for posting. 

Regards,
Powderman