Oh, 400 rounds in rapid succession is not a lot. I was discussing this with one of my sons recently. With his Ruger 10/22 he can fire 25 round magazine in 15-25 seconds, swap out and resume in seconds. That’s 50-plus per minute. Ten minus equals 500. Granted larger caliber will be more taxing but bigger hands make up for that challenge.
That’s some impressive shooting.
Is this screwed-up 65 year old guy capable of the same?
I have my doubts.