Actually, Bob, many bullets are sub-sonic ... 2x faster is possible, AFAIK, but I can't recall reading of any at 3x the speed of sound. Perhaps some high powered rifles will get up close to that speed.
> I'm speaking from a position of almost total ignorance here, but > surely a bullet is travelling 2 or 3 times faster than sound? Over the > short distances involved is it really possible to do this? >
