Originally Posted by Mikecr
In Quickload, the 338LM is SAAMI max at 60Kpsi, which implies that it's not a 'high pressure' design compared to many other cartridges.
Handle as in lasting brass life?
Primer pockets staying tight?
This I think.
The .338 Lapua had a max pressure of 450Mpa (About 65 kpsi) for a long time, it was decreased a few years ago though.
As far as I heard, the problem was not the case itself but the force acting on the bolt face, due to the big base diameter and thus area (F=p*A).
The european proofing might have had an influence on that, rifles are proof fired with a 125% pmax load. Actions not suited to cases that big had problems handling the forces applied to the boltface (increasing headspace &c).
Military loads were not affected though.
The load the british military uses in their L115 sniper rifle is still a high pressure load which propels the 250gr LockBase bullet to about 3050fps.
A lot of this is hearsay I must admit, I read it on forums, though it makes sense to me and the people who gave the information were as reliable as Shawn Carlock (experienced wildcatters with good connections to the industry).