It's exactly an academic waste of ammo. He's not first round hitting, he's raining metal in like a sniper that's too far away to make a clean shot but has to do something to help his unit. It's 100% luck and 100% skill. You can't disentangle the two. Even with the most amazing luck you'll never make that shot if you don't have the required skill level. My coach and I were squirrel killin' one day. There's a crow 1400yrds (confirmed shot BTW) and he decides to take a .22-250 High Wall rifle and shoot at it. I computed the dope and he dialed and held while standing up with no sling and offhand shot that crow, FIRST ROUND HIT. The bullet didn't even penetrate all the way through. Now coach is one of the best offhand shots in the country and I know my way around a ballistics app better than most and it was still 100% luck and 100% skill.
Later that year I took a .22lr semi-auto rifle with iron sights and made 2 consecutive 1500m shots (with a first round hit) at a disused high tension power pylon, offhand with my match spotter watching. My spotter was mad at the FRH and the follow-up but also as a newb refused to believe I couldn't do it again when I told him it was pure luck. So I tried my hardest for 20 more rounds without an impact. When the bullets hit it was like throwing a rock, no energy. I aimed 37degrees above horizontal to make that shot using most of my barrel as come-up. I tried to explain that the pair of consecutive hits was 100% luck and 100% skill.
The skill is in doing it quickly. The luck is in doing it at all.