It's strange with some weapons. Try to aim as far away from them as possible if you're having issues (lol), having them in the bottom-left or right of your screen usually works well. The reason it's so strange is that nobody else can see it; not even spectators or killcams, so precision isn't perfect.
Yeah thats its, but in same time if you shot somewhere and hit right (or left) side of monitor its kinda strange idk. Maybe change radius, but without source it would be hard