I'm going to throw a thought in on this issus. In my military issue m16 in a combat theater I had to load and unload a round in the chamber every day that I went outside the wire. After about a week of this, the primer would be dented from the firing pin hitting it day after day. Would be a small dent, but a dent non the less. All I would do is rotate my rounds every week or so. I never had an AD or a slam fire or any problems, it's just I noticed it and would make sure to have a good primer on the first round in the magazine.
I don't know if a normal primer would withstand this kind of abuse or not, I know that in my personal AR if I load a round in the chamber it's not getting chucked out by hand...it's a gonna go BOOM
I don't know if a normal primer would withstand this kind of abuse or not, I know that in my personal AR if I load a round in the chamber it's not getting chucked out by hand...it's a gonna go BOOM