Magzines: Storage and going to the range. I USE TO:
For going to the range I just put the magazines in those little slots in the range bag or the gun bag. Had some 8 slot holders that worked well for GSSF allowing me to shoot 2 divisions without digging through the range bag.
For storage I found a deep plastic storage container that allowed me stand up the magazines in compartments.
BUT THEN: Four things happened.
1) I got a lot more magazines. At least 10 for every handgun.
2) I started shooting a lot more revolvers using moon clips.
3) I switched from a standard range bag to the a BackPack style (MidwayUSA Range Back Backpack to be specific).
4) I needed to swap the drawers with the holsters and the magazines because the holster were just too tall to fit in a thin drawer.
First the workbench.
A Husky where I was using the bottom drawer for magazines and other stuff. The magazines could stand up in that drawer. But the next drawer up (the long ones) was just not working for the holsters, so I moved the holster down to the taller drawer. Now the magazines wouldn't fit, standing up, in the narrower drawer.
THEN, I found the Plano 3715 storage box. Fits in the BackPack with a little room to spare. It does not have dividers. That allows flexibility in arranging the magazines.
I actually can get 11 Glock 17rd mags in one container by laying the on their side, 2 deep.
And they fit in the BackPack just so. I can get two containers plus a gun bag and still have a little room on the side for the UpLula or an extra box of ammo or two.
And of course they fit perfectly in the Husky storage drawer.
As you can see the moon clips, 22 of them, for my 929 fit perfectly in this case as well. 10/22 and 22/45 mag's fit of course. For speedloaders I just lay them down and can get 8 Comp 3's with .38spl plus 3 HKS in a single container.
For the most used guns, I just load up the magazines when I come back from the range. When I'm ready to go practice of compete just slide them into the BackPack and I'm ready to go.