Well, good news (I think). Seems other Mauser Loaders have had a similar problem with the 8mm karabiner round. Big, fat and long is a problem for the “Delicate” throat of a Yugo 48 Mauser. Seems these folks are setting the bullet to the last groove and crimping a bit. When the round is chambered it engages the lands and all is well. Sure enough, I have tried a couple dummy rounds and found that an OAL of 2.81 allows ample room for round and does not leave too much of the bullet extending into the cartridge. Tomorrow night I will load and fire a dozen or so over some Alliant 2400 – pictures to follow.