This round was used by the Swedes in the 1919a4 and the Mauser rifles (K-98) carried by the crew. As Can-Am states they are easy to spot they have a big brake on the muzzle, if you ever fire one you will immediately appreciate the brake being there....
The Swedes did export both the guns and the ammo.... It was a popular combination for tanks and APCs in Central and South America....
We have modified both 1919a4s in SA and FA. Work great, well except for the muzzle blast.... Have pictures of where ours came from if anyone is interested....
John