Don't know about that. There will be some deviation, but the question is how much. The bolt will stay in the barrel for approximately one tenth of a second after the trigger has been pulled. If I turn that crank very fast, I might get one turn per second.Effective diameter is 25cm, circumference is 78,5 cm. Therefore the bolt will have travelled 7,85cm counter clock wise on its 2 meter long way through the barrel. That counter clockwise turning will continue after the bolt has left the muzzle, but then again the bolt has a lot of air resistance sideways, and not very much in flight direction. So the air will reduce the turning effect. My former gatling gun designs and also the minigun did not show a negative effect - and the minigun turned much quicker than one turn per second! We shall find out.