There are two shooters and... if im not mistakin the one you are commenting on was my buddy that learned that very quickly. He is a big guy (over 6'3" and 230lbs) though and the NULA does not fit him well. I think you can tell he made adjustments in his other shots.

Steve is a excellent marksman and the only one who has beat me when we are competing. I could post a vid right after his first shot but its no G rated. LOL

It looks to me like only that one wasn't well planted on the shoulder. I intentionally let the 325gr push me. It didn't hurt but it did have a nice push instead of a sharp rap to the shoulder. We worked for a hour or two and this was more about having fun and testing a few loads for sabot failure and bullet performance when pushed hard.