I have a Rook rifle which came down to me from my great grand uncle. I feel a little shy as it is somewhat battered but since the OP asked for rook rifle photos, here goes:

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A friend of mine had this ammo loaded in the US and brought it out to me here in Bangladesh, where I live. The bullets created a slight bulge in the case which prevented them from chambering. But a gunsmith friend of mine lightly ground down the bulged area till they fit. They work! I use mine to shoot jackals (Canis aureus) and Muntjac (Muntiacus muntjac) which it does admirably out to a hundred yards or so.

All the best

Skeeter BD