I use to play with real cap:30rnd
Now that i have 2 ak's i play mostly with 100rnd (ak74) as ak74 real caps are near impossible to find
I just shoot by burst never in long 115 rnd burst as conker said (but its nice to unload all the mag on players that dont call their hit
)
I just bought an ICS M4 and bought 75rnd pmag because i couldn't find pmag in real cap... sold out.
I just depend on your style of play you know.