Dunno. I did some math on a couple of the departments who have ordered Ammo in the last year, most of which was brought to our attention in this forum . .
On the average, it works out to about 700 rounds per person (who carries) in those departments. Honestly, I don't think you can teach a person to shoot a handgun accurately and be entirely proficient with 700 rounds a year . . Hell, back when I was shooting Combat pistol competitively, we all (the team) shot about 600-800 rounds a week (each) and then another 300 rounds when competing. Add that up and one shooter will burn up over 40,000 rounds a year if he shot every week, take that times ten and you have a truckload of empty brass . .
And, Yes, the city I live in was paying for all that Ammo. But I literally wore out a couple of Pistols in that time.
Notably, if you have several semi-automatic pistols of the same caliber, and a semi-auto rifle of any caliber, you would normally buy your ammo for them in lots of 500 at the minimum and I usually buy all my pistol ammo by the thousand. It's cheaper by a bunch . . So, if you're much of a shooter, normally you'll have 500-1500 rounds on hand for each gun, which, upon discovery by the liberals, would make you (or me) an "Extremist" . . .
And regarding the 7000 assault rifles that were ostensibly purchased. Law Enforcement decided after the shootout with two bank robbers in LA about ten-twelve years ago, where the robbers had full body armor and apparently a jillion rounds to feed their AK-47s and the cops were "outgunned", that they too, should all have access to high powered rifles.
So, as budgets allow, the PD's across the country are arming themselves with AR-15s, some with selective fire (SWAT Teams) and I noticed, in the news videos of the Dorner deal in LA, most of the cops there had Ruger SS Mini 14s w/ 20 round clips . . The main problem with all this, is, The .223 cartridge. It's a handy caliber to "spray" with, or to shoot coyotes with, but if I'm gonna lay my @ss on the line, I'd want something that shoots a .308 (7.62 NATO) in at least a clip fed Semi-Auto. Hit the target once and forget about it.
And there's nothing neater than the Old M-60 . . If you ever shot one, you can say you shot a true anti-personnel weapon . . It's just waaayyyy too expensive to feed!
But that's just me . .