A container for an ammunition cartridge having a conical forward portion includes a generally cylindrical cap having a closed end and an open end; a generally cylindrical main body having a closed end, an open end and a wall, a thickness of the wall at the open end decreasing from a larger thickness to a smaller thickness to form a taper on an exterior surface of the wall; a latch assembly disposed in part on the cap and in part on the main body to lock the cap and the main body in position; a first gasket disposed in the cap; a second gasket disposed around the taper of the main body; a cartridge support disposed inside the main body; a pair of bosses disposed on the main body and axially separated; and a strap connecting the bosses and comprising a middle portion and two end portions, whereby when a load is applied to the middle portion the end portions are forced against the bosses.