All funning aside, that stuff is a real PRIZE.
Our airplane museum in Brandon (Commonwealth Air Training Plan Museum) could use a box of that for display. They have a website.
The RED LABEL ammo was carefully dated as to its expiry date. After that date, if could no longer be used in SYNCHRONISED machine-guns, but it was okay for the wing-mounted Brownings in the Hurris because they were free-firing and didn't have to pass through to rotating propellor to get to Fritz.
My Dad was with 133 FS RCAF, stationed at Lethbridge, Boundary Bay and Tofino. Their Hurris were Hurricane IIs, made in Canada. Each had 6 Brownings in each wing and every gun was speeded up to 'max', which was a tad over 20 rounds per second. That's 1,440 rounds per second, each and every time you hit the button.
Dad told me that, later in the War, 135 was stationed at the same base, had their hangar on the opposite side of the runway. One day the Armourer was showing a new trainee what to do and what not to do. Dad was checking the tach take-off on the Merlin at the time, heard the Armourer say, "One thing you never do, is THIS". And the Armourer mashed the button and all 12 Brownings let loose, putting about 500 rounds of ammo into the top of 135's hangar! Dad was safe only because he was INSIDE the propellor arc at the time.
It can happen to anyone; just don't get TOO familiar with anything or it might bite.