I tend to use high caps, I've never really needed more than 1 magazine per game but I have the one that came with my rifle and a larger M16 style high cap. I did buy two mid caps from someone second hand over a year ago, but they are either funky as they do have some outer wear and tear, or maybe my M4 just doesn't like them, as the first 5-10 rounds always just fall out the barrel onto the floor. Pro to the high cap for me is being that winding noise when it runs dry, so I know I'm actually out of rounds as when I did use the mid cap I kept having to fire the odd shot at the floor to know if it was still feeding and had rounds in it. I would like to try running mids at some point, but I can't justify buying them right now. Higher kit priorities and all that. But I do like the reloading factor when I can on my other weapons, such as loading 16 rounds per pistol mag rather than the capacity of 28/30 it can take.