Thanks for the link.
Interesting project.
I don’t think I would have been able to do that to one of my guns.
I couldn’t either! It was bad enough cutting 1” off the end of my SU-16A and threading it for a flash suppressor. Couldn’t imagine taking it down like that (or waiting for the BATFE stamp so I could make a rifle less than 26” long/16” barrel).
It’s very interesting data, though, and I love the fact they walked it down an inch at a time, and did all the different loads as well. Seriously valuable info! I love the Internet for this kind of thing...