Yes, I still have one of those little Webley and Scott .22 bolt action shotguns. I use either Eley or RWS .22 shot cartridges.

I do use a Winchester 9422 for rat shooting with shot cartridges but it will only work with the CCI ammo as the crimped rounds stick in the chamber after firing. About 10 to 12 feet is about the range; 15 yards is a bit ambitious. Nice little find. That CCI stuff is a bit dear over here though! Lagopus.....