From the May 2011 American Rifleman:
According to the Army standards and training manual, PAM 350-38 (2009 version), a Regular Army light infantryman should fire about 1,200 rounds a year, assuming he participates in everything: basic marksmanship, day-night qualification, unit live-fire exercises, shooting in NBC gear, thermal and infrared (IR) sights, etc. His Guard and Reserve colleague should expend 660 rounds. But interviews show that almost nobody comes remotely close to that figure. Furthermore, for “plain vanilla” soldiers with access to shooting simulators, and who do not use thermal or IR sights, the specified annual expenditure is 490 rounds for active and 294 for Guard and Reserve.
I shoot about that many (1200) 7mm WSM rounds in a year, between practice and competition, and I shoot a very light F class schedule. I shoot 3-4 times that much Grendel, and 3-4 times that much 5.56.
I shoot about half that in handgun, (I need to shoot handgun more!).
We expect our warfighters to be proficient when they don't shoot any more ammo than some competition courses shoot in 2 days!!
NOT GOOD, NOT GOOD AT ALL!