Mike S,
Haven't encountered much mention of that when doing research, and if it was a big problem I doubt the Swedes would have continued to use the Model 96 as their military rifle until the 1950's. There have also been some far more popular bolt-actions that didn't provide much (if any protection from a blown primer or case, such as the pre-'64 Model 70 Winchester
Apparently the big problem early in the days of smokeless powder was cases splitting--which is why W.D.M. Bell switched from his absolute favorite elephant rifle, a customized Mannlicher-Schoenauer 6.5x54 (which Bell naturally called "the .256'). The Austrian ammo he used kept splitting its cases, so he returned to his 7x57.
But brass soon improved enough to make split cases a pretty rare problem. As somebody once pointed out, good brass is what made the pre-'64 Winchester possible!
