I'm pretty familiar with the US version and love the 30-40 cartridge. Had a chance a while back to pick up the Danish model. Interesting barrel shroud and the magazine opens forward rather than to the side. This one is in great shape, made in 1891. I already load for the 8x58r in a rolling block so easy to get her up and running. Groove diameter about the same as the rolling block at .325. It shoots well but I do have trouble seeing the issued sights.