[Hang'emAll]

I watched it. It was very impressive.

However I question his assumption of just. .223 55gr.

There were reports of an AR10 snd he could have had a mag or more of low grain high velocity personal defense ammo that may have been a reason for the difference between the frequencies.

[Steve Van Doorn]

Watch this video. At 14:00 there is absolutely no doubt what so ever there are two weapons fired:
https://vid.me/BbmlX