to magnum prime or not? (rifle reloading questions)

[gingerbreadman]

Hello, i was wondering if someone could explain to me how and when a magnum primer is benafical over a normal primer.....

I have reloaded thousands of rounds for my .270 with great success and always used federal large rifle primers, i have recantly loaded many many successful loads for my 300 ultra mag with federal magnum large rifle primers...... i am now working on finding a load for my 30.06 and im unshure what primers i should use, iv looked in many reloading manuels and get condradicting suggestions, i could use your oppinions on what primer to use.......

please enlighten me on how a primer works.....

thanks guys.....

-josh