Thank you for replies and videos, very interesting. Anyway, I think human loader speed will fall down some time and it is impossible to keep 6-8 sec rate long time. As for SB - current ratio is 10 sec (T-72) and 6 sec (M1A1), in accordance with my checking. How do you think, is it possible to make improvement of T-72 rate of fire to 8 rounds per minute (in accordance with T-72 manual, as Dejawolf mentioned) and simulation of loader fatigue in future update? Is it a good idea?