You guys mention the 50 cal box, but which one. There's the normal 50 cal, A WWII 50 Cal, and a Fat 50 Cal. Personally I prefer the 40mm Long Low ammo can. It fits 16 25 shell boxes (2.75inch) with a little room to spare. Here are the internal dimensions L:17.25" - W:5.5" - D:9.5"
http://store.colemans.com/cart/ammo-...low-p-224.html