This chapter from an older Sierra reloading manual has the answers to a lot of your questions, and more information on top of that -
http://www.exteriorballistics.com/re...sgunreload.cfm
I believe the danger from using too sensitive a primer is slam-fires rather than pierced primers. Pierced primers will damage your gun, but slam-fires have the potential to damage
you, especially if it is out of battery.
I also suggest you pay particular attention to full-length resizing.
Good luck.