I saw the rule requiring it to be shouldered while burning a round, and the minimum distance. But that distance doesn't apply to intentional shots at a close target. And we are talking about intentional shots.
At one 3gun Nation match (regional) there were 4 close targets, between 5 ft and 10 ft depending on how close you got to them. They were low to the ground and angled at a 45, you had to shot into the ground to hit them. A few of us shot them on the move without having our rifles shouldered. They were intentional shots, and we did aim them by point shooting. RO at the time said it was OK, I did ask before I did it. I was told that as long as they were intentional shots, and I didn't break the 180, I was OK.