I do battle belts a little differently; It is my primary loading area which means one rifle mag in a HSGI Taco, one Pistol mag in a HSGI Taco, a dump pouch, BOK and pistol holster. Admin stuff goes in your pockets and mission essentials goes in your appropriately sized backpack. Thats it. Keep it simple. You then manage the load from your chest rig, shifting/shuffling mags down the line during a loll to always be accessing your re-load mag from the same spot on your belt.
I like this method myself because it allows you to have multiple weapons systems (AR, AK, 308...) with one standard belt as long as you have a simple chest rig for each of those specific systems. I prefer the rest of my mags to have some retention flaps of one kind or another - not open top). The only thing changing is what mag you have in your reload pouch on your belt, nothing else.
If I was out looking for a firefight this would not be the idea setup. Thats what armor and all open top high capacity magazines are for. For a range set up, scouting an objective, or other non-direct action activity, it works very well (for me).