i would think they WOULD NOT let you do that,,be like loading your shotgun and staging it,,,safety problem,, if it got kicked or knocked over,,could go off,,but it has been a long time since i played that game
you could always start with the 9 and load on the fly,,,when ever i needed more than 10,,,i remember some stages had 11 or 12 shots,,,so everybody loaded on the fly,,,i would load my marlin in the side with the action open,,kinda like single loading a pump shot gun,,,toss it in and close the action,,,works pretty good and fast,,,dont know what kind of rifle you are using but if you have a marlin give it a try,,,some practice and it becomes second nature
ocharry