Originally posted by UnmitigatedDisaster
Some numbers to play with. An average day at the range for me with my PPQ in .40 is 300 rounds. Keep multiplying that by the number of people involved in large training exercises and that number grows quickly. I don't know if the qualifications differ from state to state or organization to organization, but an LEO friend of mine says he puts an easy 500 through his issued Glock if they do a training/drills day.
Perhaps another LEO or similar could chime in? My point is pretty simple on the quantity of ammunition purchased: you go through a lot very quickly even by a single person, add in a few departments worth of people and you can easily start sending 20,000 plus a day downrange. Also, the military standard issue sidearm is a 9mm, so it likely isn't going to National Guard or state-bound military.
I run through 500 rounds on a qualification day. Some guys run through more, if they don't make the grade and have to re-shoot the Q-course. None of that accounts for "practice days" or the ammo burnt up on them.