Width of the cone, in overwatch, and aiming

is there a correlation between the wild of the cone, in Overwatch, and the precision of the aiming when the character will shoot? (i mean, the smaller is the cone, the better will be the aiming?)

The shorter the distance the higher the accuracy and the less obstacles in the come the higher likelyhood you’ll hit the target instead of obstacles. But it all depends on where the target moves into the overwatch cone.