For me, I could care less if someone claims MOA on 3, 5 or 50, whatever makes them happy. I've said here for a long time that I'd take a 1.5 MOA lightweight rifle and kill anything I need to kill.
So the challenge on this challenge has been to shoot my lightweight barrels as fast as I could get a sight picture and no what my guns will do. Nothing wrong with shooting heavier match type guns or letting the barrel cool, just not what I'm after.