Jep it is a 25 cal and it is a very nice rifle I have permission to shot these greylags from the farmer,they have become a problem the last few years here on the Faroes island! But i mostly hunt them with a shotgun.
What a great problem to have (for you to help out with)! Thanks a lot for sharing your experience, we don't see the greylags here in the US. I used to hunt Canadian geese when I lived near the Great Lakes (Indiana).