Adjustable shotgun shell holder

This is a holder for any shotgun shell box with shells of 2.75 inches in length. The box can move along the slots in the bottom and be adjusted to fit any size shell box from as small as .410, all the way up to 12ga. I designed this shotgun shell holder to mount on a new gun cart that I built, so that you can easily pick up your ammunition and guns when going in-between stations at a sporting clays range.

You can see these in use on my [folding gun cart](http://www.timberframe-tools.com/household/harbor-freight-gun-cart/).