Re: high primers.
I don't know if anybody else does this, but with my centerfire defense revolvers, I buy two kinds of ammo:
1) Cheap stuff - there's a rule with this: it doesn't get loaded or played with anywhere BUT at a range.
2) "Good stuff": if I buy a box of, say, Winchester Supreme 130grain +P 38spl, or Cor-Bons, or whatever, FIRST thing I do is open the box and hand-inspect each round. I look at the primers, I look at the primer SEALS to make sure 100% of the primer edge is covered (in case of moisture), I look at the JHP, I look for "dings" or out-of-roundness" or whatever. Any that look mildly bad get filed with the "cheap stuff" and I'll use 'em as range fodder. I'll take a small selection of "good stuff" and try it at the range, checking group size and where they print. The rest is carry fodder or the stuff you keep the guns and speedloaders stocked with at home.
So at home, I'm only loading/unloading (for cleaning, dry-fire or whatever) "hand inspected by me good stuff". I'm not going to get a high primer problem.
Paranoid? Maybe. But I know that any gun I reach for is loaded with as close to "known good" as I can get.
(Yes, I wipe down rounds I've inspected, so the brass doesn't tarnish from finger oils.)