The Cheney Video

My YouTube video of the day has some dubious authorship, as a reader writes:

You do realize that Alex Jones is a conspiracy nut nut who thinks the Jews did 9/11 and not a ballistics expert, yes?

Er, no. Actually, I didn't. I just watched the video sent by a reader and found it persuasive. It's unfortunate that the guy is a crazed nut, but I'd still like to know why he's wrong in this case. One reader argued that different shotguns, even of identical manufacture, can have different dispersement, a fact that would undermine Jones' case. Maybe other readers can help debunk this theory - or not.