I am trying to wrap my head around the numbers.
That 3,264,281,914 was the stuff made from June '42 to April 20, '44.
How much was in the US armoury's when they were brought into the war? stuff sold(given) the to British before that?
I was trying to do some quick and dirty math, but the hard part is knowing how much was gone through on any given day.
Over 365 days lets say there are 5000 troops engaged in combat using .45 (Pacific and Europe). Lets say that each troop fires 300 rounds a day.= 547,500,000. So there is half a billion. So in 3 years =1,642,500,000. That's half of that production.
Loose a few million to U-boats. Loose a few million that are issued but dropped, or sunk in landings. Add a few million for troops in training.
I bet they used at least 2/3 of that 3.2 billion, and stockpiled the other 1/3.
Edit: I also remember watching a documentary about the plans to invade Japan. The US command anticipated so many casualties that they ordered so many purple hearts they were still issuing them well into the first gulf war. (I forgot the numbers)