"I Loaded what some guy told me to load" is a fail on so many levels. If that's your reloading procedure, I humbly suggest you only buy factory ammo, and leave the "reloading" to someone with a modicum of common sense....before you hurt yourself (which might be Darwinian) or an totally innocent someone sitting next to you.
What part of "work up every load from below" is too hard to understand???
Dude can you even read???? Read my post again and see where I loaded LESS than what the guy told me, a lot less too. I've been reloading over 25 years. Dumbass!
To naval person yes it was a Winchester primer
I've had one primer in a lifetime of shooting blow a tiny hole in the radius of the primer cup like in your picture. Another brand not Winchester. Looks like a bad primer cup and not bad brass. My bad primer with a hole in the radius blew gas and some small particles back at my face out of my bolt rifle.