I have fired over 50,000 rounds through the coax gun on a M60A1 tank. I have fired the same amount of rounds from a pintle mounted .30 cal and .50 cal MGs. When you fire the coax mg on a tank you feel a slight vibration but it moves your head and blurs your vision as much as a gnat running into your forehead with a 30 MPH tailwind. The pintle gun will not shake your vision you keep you arms stiff.
The bow gun is mounted in 4 or more inches of armor plate.
Instead of wasteing time on programing this FAKE reality things. Why dont you work on some real world stuff like TRAJECTORY of the main gun round.