for hunting try this.
roll three six sided die.
the first die number is the difficulty to simulate the windage, elevation, visual conditions, etc. this is the target number you need to meet or exceed.
the second die number is your shot. if it is equal to the target number or exceeds it the shot was good. if the shot was good you may ignore the third die. if the number was less than the target number, your shot missed. you will now refer to the third die number. that is the number of posts you must make before you can shoot again. these posts would contain your actions to move to a closer vantage point, catch back up to the critter, etc. then you can make another shooting post and roll again to see how you do.