Re: What is the point of the 338 edge
As far as neck life, I would try to anneal your necks. This process is fairly easy and will extend your brass life. If your primer pockets are loosening then it sounds to me you are loading way over safe pressure limits.
I read an article about a guy shooting a 30-338 Lapua. He had annealed after every firing and to date as of that article, he had reloaded the same brass 59X's. He also set a new 1000yrd record with the same cartridge. Anyway, sounds to me like annealling is the way to go.
Just my .02
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.  But small is the gate and narrow the road that leads to life, and only a few find it.
If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger
Friends don't let friends develop canonitis!
arguing over the internet is like the special Olympics....even if you win, you are still...special!