I am very interested in the original purpose of the thread, and hopefully we can steer away from the current argument and go back towards the original idea. If someone makes a claim that you feel is BS please don't argue with them; fabricating a tall tale is a bit immature, but so is fueling an argument. I am sure that most of us are clever enough to decide for ourselves which claims may be embelished. I appreciate photos of targets and data, but I still have to decide for myself if the information is truthful.
On a calm day from a nice solid shooting bench, with my best rifle (also an ATRS) and handloads I can shoot an average of about 3/8" 5 shot groups at 114yards (why they never placed the target at 100 yards or meters is beyond me). Depending on ammo / rifle quality the group size goes up from there. Because of my obsession with load development it seems that lately I have spent more time bench shooting than field shooting, but I know that last fall I took a few hours to make a drop chart for a .338 Lapua AI on a calm afternoon and I was able to shoot roughly 1 MOA with 5 shot groups out to 400 yards. I also fired a couple shots at an 800 yard rock - later the bullet spatters showed me that I was grouping larger than MOA, but I don't honestly remember how large - maybe 1.5MOA? Shooting offhand, kneeling, sitting, etc. I have no idea what my group sizes would be, but I know they would be awful.
...and as per the last post - I personally give 3 shot groups absolutely no statistical relevance whatsoever. I always shoot 5 shot groups.