Anybody use one? I prefer slip-top ammo boxes for my pack. The cheap clear plastic ones are pretty much disposable. They don't last long. I go through 2 every hunting season. 338LM wasn't listed on their magnum box (RLG-20). I'm hoping some has one of these and can measure the inside of the squares inside. I'll probably order some for my 300RUM and 7RM, and try the LM.