I always have a spare breech plug for each of the rifles, but most of the rifles I have, the breech plug has withstood hundred of shots. And there is no erosion of the breech plug metal in mine.

I did read a post where some of the Omega's had breech plug erosion which I found interesting. My old CVA Staghorn Magnum has been shots more then I care to think, it's my loaner/guest shooterrifle as well, and it has the original plug.

The primers you will purchase have different heat flash to them. Some are just hotter then the others. The hotter the primer the more prone with some powders like Triple Se7en, is a chance at a hard crud ring... I use the Winchester W209 and Remington Kleenbore Primers. The Winchester when shooting pellets and Kleenbore when shooting loose powder. So far, so good.