When I started airsoft I was still recuperating after illness and couldn't run. I think that's why I gravitated towards the support role. I've not found it hard to get through 4 AK hi-caps in a 40min skirmish. I suppose I could have run 12+ mid-caps, but I couldn't have afforded it.
Hi-cap Hero reporting for duty. Say what you like about realism, but 3 AK rounds would punch through pretty much any cover we habitually make use of in airsoft, so extra rounds make up for this.
I've been using AK mid-caps recently, but they came 2nd hand with a gun and some of the springs work better than others, so knowing their effective capacity in the field is pretty much a matter of blind luck combined with suspicion having informed the order I pack them into my vest. Excitement reloading under pressure, yes, but also 'kin annoyance...
I just bought another 5 mid-caps for my L1A1 - semi-auto only though. I want enough for a whole afternoon using it as a DMR (425fps).