Vietnam total bullet accountability

[Ravenhull]

I've heard this story a few times, usually as part of the 'Vietnam was lost because the generals were idiots' arguments. The story is that at one point during the war, there was a directive from the top requiring that soldiers returning from combat operations had to account for every round fired (i.e. 1 shot at 0700 at possible VC, to rounds at 0715 at confirmed VC...).

Anybody have anything more substantial to this?