when i do this, its not quite full speed
if your body is going full speed it moves to much to fire properly and accurately, however, u can make a stable platform by bending your kness and this acts as a shock absorber, and it enables you to be able to put your bottle on your shoulder and fire while running pretty quick! watch the 12/13th video from leg 3 of m25, and the last 10 secs of it, u will see me (red rase pants) run down the side like this, bunker a guy and grab the flag, it works good and it also makes u low so u cant be seen as much, its like standing still(same sort of platform) except your moving