I will admit that I am changing my practices somewhat. I'm keeping the "good stuff" that I might once have used put away in case one can no longer purchase it. For 5.56, the stuff like 90's Radway Green SS109 on strippers in bandoliers in cans, clean and hot Guat 193 in battlepacks, and boxed IMI (not the floor-sweeping surplus out there now), which I've found to be very accurate. That, I'd save for competitions of accuracy, or emergencies. I'd rather buy and use plain Prvi now.
BTW, for anyone looking for that caliber, do not, repeat, do not order the IMI surplus that's appearing from places like R Guns right now. It's like what they found on the warehouse of rejects, and people have found that some rounds don't even have powder, just a primer. That could be downright fatal if you didn't catch it. :|