I'm not really an ar person either, I have an ak. From what I've heard though your experience is the opposite of many others. My grandfather has an mini 14 though too that he hasn't had any problems with.
Hopefully someday I can afford either a nighthawk or wilson combat. Not sure I'd be able to pass up spending money on a custom hi power though if I was dropping that much.
Heres a little of the stuff i have. Very old German Mauser, Thompson (15 rd mag for nj), 1944 M1 Garand, 1941 Walther ppk, and the other pic is my colt 1911 serial number 10,xxx, (made in 1912).
I don't really try out a lot of different ammo, mostly because I can't afford to right now though. I'd be interested in how the critical defense tests turn out, that's what I carry in my kel tec. Surprising that the gold dots performed so poorly, seems like a lot of people carry that.