As to a locked case --I am using a Swarovski case I got with a pair of EL's I bought a couple years ago...for the actual ammo itself I would think Huntingtons should be able to fix you up..I use regular plastic ammo boxes that hold 20 in each for my 300 U-Mag and .416 --did that the past 3 trips and will use it again when I leave--so far..no questions or problems..

Ripp