That's interesting...I've not used magnum primers in my .338 Fed, nor have I had any difficulty exceeding factory loads and showing good accuracy with standard primers. In fact, I've loaded a bunch of .338 RCM loads with standard primers, to see if I really need magnums with them.
Maybe I'll stick some magnum primers on .338 Feds and see if it matters... .
Dennis
"The more you run over a dead cat, the flatter it gets."
"If you're asking me something technical, you may be looking for My Other Brother Darrell."
"It ain't foot-pounds that kills stuff -- it's broken body parts."
.
