"Is Norma brass worth the extra cash?"
No. And I have had no problems at all with either WW or R-P cases.
I agree... I never thought of Norma brass being all that good, especially in the Weatherby versions....
I've had good luck with Rem./Win./Fed. brass, and i like RWS brass too....
I wouldn't pay more for any brass unless i was bench rest shooting as my Win./Rem./Fed. brass will shoot 1/2" and better groups in my guns that will shoot that well... The other exceptions is for cal's like my 9.3x74R double that gets RWS because Rem./Win./Fed. doesn't make it in that cartridge...
DM