Not every rifle from every soldier would go ping at the same time so rushing a position at the sound of a ping would still not be a good idea unless it was a single soldier. Also I really doubt anyone is going to be hearing a ping over the sound of battle. I seem to remember from reading one of the Gunner Ashe books many years ago that the Germans did listen for an "eight round cadence." Might be a faulty memory tough.

Jerry Liles