How many rounds of ammunition would the typical DHS agent shoot in practice each year. Since you instruct them you should have a pretty good idea.
There are several different departments within DHS and each one has their own regulations on qualifications. I work for the Border Patrol and each agent gets about 100 rounds a quarter for actual qualification and practice. Sometimes it is more depending on the nature of the training. We have nearly 20k agents in the Border Patrol. So 20k x 100 rounds x 4 quarters equals 8 million rounds just for basic qualification. This doesn’t even include tactical training of regular line agents or the training of our special operations units such as BORSTAR or BORTAC. Keep in mind this is just one agency among many within DHS. Office of Field Operations(Legacy Customs/INS) use nearly as much ammo.