I"ve shot a bunch of different kinds of ammo through my Bushy AR and everything runs fine. One time I was shooting a lot of rounds of wolf pretty rapidly and I had a casing expand and it wouldn't extract. Aside from that I've never even had another malfunction in my AR. I prefer PMC .223 because it's not steel and it's a bit cleaner then wolf but is still reasonably priced.
As for mags I have nothing bad to say about P-Mags. The aluminum GI mags work fine but the pmags feel much stronger and work flawlessly everytime.
