This increase seems to appear consistently even after you add the complications of cover. Replacing the Destroyer in the initial test with a Baneblade (90% Ranged accuracy, Baneblade cannon with 100%/-10%), adding two sparse forests in the way (two 10% LOS obstacles) and entrenching the marines in a...

Edit: DERP , I just realized this has got to be the effect of high morale, I guess you can safely disregard this report. While fiddling with the editor trying to figure out the exact formula for accuracy, I came across what I think is an inconsistency in the way it appears to be calculated, or at l...