I have my 577-450 ammo in two plastic boxes that I got from midway usa. One is a frankford arsenal box that has "magnum ammo box" on the top and a sticker on the bottom for size "511". I can put about 25 rounds in it, diagonally, bullet down. The other box is by ntn case-guard H-50. It will hold 50 rounds in it, bullet down. It also has a handle.
john