Quote from
www.frfrogspad.com/kragrifl.htm "While it is known for having the smoothest action of any rifle, its one locking lug action was not as strong as some of the other designs which utilized 2 or 3 lugs and made it susceptible to group stringing with wet ammunition because of unequal bolt face force." I still don't get it but it seems to be true. Ballistics is weird science.
KFS