Mitsubishi Stuka and Thunderbolt

[Pursuivant]

Originally Posted by Igo kyu

What you have to do is make any round fired not along the exact bore of the gun, but an random point in a circle around that boresight.

+1. This is exactly the mechanism needed. Various factors that Horseback, myself and others have mentioned just increase the size of the circle.

Originally Posted by MaxGunz

Or you could simply round off the aiming angle values (3D takes 2 angles) to say 0 decimal places for a rookie, 1 place for the next level, 2 for the next and so on. If the shot is close, even a rookie won't miss though the rookie may not hit the exact aiming point.

And this is a potentially quite good way of differentiating between skill levels, although I'm not sure that the difference between "Rookie," "Average," "Veteran," and "Ace" skill is actual orders of magnitude. Even so, it's an elegant solution.