Here's a picture of how I'm using small pelican cases to keep spare ammo in my pack. They're sizes 1010, 1030, and 1040. 1010: 50 rounds of .357sig (w/ thin layers of soft foam between each row) 1030: 15 rounds of 2 3/4" 12ga shells. 1040: 60 rounds of .357sig (w/ pre-cut foam from retail ammo box) They are waterproof and crush proof. They also fit well and have no rattle after inserting a thin piece of foam on the lid. You can also fit filled mags in these cases, depending on the size of the mags and the case size. I'm a newb in many areas of interest to this forum, and feel like I don't have too much to contribute, yet... so I hope someone finds this useful
E.L., I got mine through special pricing they have on candlepowerforums from OpticsHQ. http://www.candlepowerforums.com/vb/showthread.php?t=114584