actually, what it sounded to me is that there is a weapon discharging from afar, and bullets striking the ground nearby. however, it did not sound to me as if there were conclusively two distinct weapons involved since a bullet from one weapon could in theory produce a sound upon exiting the barrel at the source, and then that same bullet could strike an object and produce a second sound. of course it could be two rifles but logically from the above (i claim no expertise, just trying to follow along here) it does not rule out a single rifle scenario. ok, what am i missing...
Hearing Aids?
What you're missing is that what you call bullets hitting the ground and others claim is an echo of the actual shooting in many cases takes place before the actual shooting volleys start...That's the cart before the horse to the extreme...