Thanks memilanuk.

Bottom line, the safety margin has been reduced for Savage rifles using the 338 LM round. Ditto for Remington. That might be OK for commercial ammunition where max pressure is carefully controlled at 60,916 psi (CIP), but it's a risky proposition for reloaders experimenting with numerous components with wide tolerances.

I think that if I ever decide to buy into the 338 LM or similar-sized cartridges, I'll stick with actions designed for it.