Fortnite 200?

Somehow I notice that I rarely meet 200s even though I'm exactly on the opponent's head and I really have to stand 1 to 2 meters in front of him and hit his head exactly so that it is a 200 but when I look at myself or so I notice that he hits 200s despite a further distance and I only hit a 100 although this is a headshot, why is that and how could I take better shots with the shotguns in the future without even a stupid 30 hit but good ones hits?

Must aim slightly over the head, but so that the crosshair is still 2/3 aimed at the head.

Why then?

Ka is just like that. At least on the PC