Ha! I thought I was the only one that was suckered into buying some cheap AMerc ammo because the brass is reloadable. When I find a piece of AMerc brass on the range, I throw it as far as I can into the woods and wash my hands as quickly as possible.
But seriously, I shoot just about any commercial brass in my pistols as long as the primer pockets are not crimped (PMC, WW, RP, FED, Speer). I buy once fired brass because I am cheap, but for new brass it is hard to beat Starline's quality and pricing.
For rifle brass, I pick a readily available brand and stick with it; I've had good luck with REM and WIN. I do not mix brands of rifle brass, because accuracy suffers when I do that. I start with a good supply of new, unfired brass and go from there. When the batch wears out, I buy another quantity and continue the procedure.
I uniform the primer pockets and deburr the flashholes on all my rifle brass. The practice of keeping separate "lots" of brass prevents me from repeating these tedious procedures after every firing, and makes it easier to monitor case length.
I hope this helps.