[Bill Douglas]

I suspect this guy had (using their term) fired a lot of harassing shots and got quite used to the gun and projectiles trajectory. Then used this knowledge to his advantage when he had to.

Ha, I remmember as a kid shootiing at (an empty) tin shed duck shooters blind in the middle of a small lake with a .22. It was about 400 meters away. I'd fire at something like a 33 degree angle and watch the splash. I knew when I'd hit the shed as the shot would sound like kirrrr-wang as it hit. All this chit about .22LR rounds being dangerous to a mile and a half. In reality about 700 meters max.