I've been an instructor at several points and spent some time as a small arms evaluator during my first four hitch, as well as having been a tank gunner notorious for being particularly promiscuous with my M73 co-axial machinegun. Later I worked as a small-arms repairman and test-fired everything we'd worked on, notably the Remington 870 shotgun [about 150 guns in the morning, 150 more in the afternoon, 4 shots each, 8 in those with magazine tube extensions] the M1911 pistol, M14, M1 Garand M60 machinegun and M8 flare pistol. I've been an amnmunition tester for a couple of companies, and have been involved in at least a dozen 5000 or 10,000 round endurance tests, including one of 10,000 rounds of .25 automatic ammo.
Certainly in the hundreds of thousands, probably a million-plus something. I once cleared out a semitrailer load of 9mm Parabellum with three other guys in a bit over a week. 64 rounds to the box, 20 boxes per ammo can, two cans per crate, 48 crates per pallet, 40 pallets to the truckload.
36 rounds to the magazine, four seconds per magazine to empty one. Change magazine, repeat.
Lots of ammo. Lots and lots.
-archy-/-
This is just under 5 million rounds. Roughly your share would be 1, 650, 000 rounds
Next question that comes to mind........I know it's rude to ask but how's your hearing? LOL