HPG Recon Kit Bag. I don't hunt with this all the time, usually just in support of my precision rifle. A couple things change if I carry a fanny pack or a backpack as well, but this is pretty much it.
Rangefinder pouch is ziptied on when I'm done with archery until I get a Molle pouch. TAD admin pouch and a bleeder kit 550 corded to the bottom.
Contents of external pouches
In the Kit Bag admin pouch I have batteries, a light, ammo card, VS-17, compass and a flare.
In the main compartment of the KB I carry my otterbox survival kit. This goes in my pack otherwise and is switched out with a handgun.
I like the idea of the BFG 10speeds since they can be used to carry things other than magazines, or magazines.
If you wanted something solely for magazines, you could run these upside down to draw the magazines from underneath. That would remedy the bag from riding up.