The magnum bag is huge. It measures 29-1/2"L x 14-1/2"W x 16"H. Its ability to hold a ton of gear is also its primary downfall - when loaded up, this bag is incredibly heavy and hard to carry. Basically, I have resigned to using this bag as a 'catch-all' for my hunting gear inside of my truck during the hunting season. Very rarely do I actually haul the bag out of my truck and carry it with me to the blind, stand or hunting spot.
The waterproof, high impact plastic bottom is nice in terms of being able to set the bag down in the elements. Pockets are well arranged and include - shell loops (16), accessory pockets for everything from pens to cell phones to calls. Nice external pocket on the end that can hold a large thermos. If you are looking for a catch-all storage bag, this will suit your needs - but don't count on being able to haul this bag fully loaded to and from the blind.