I use bunny busters and a football. I toss the ball a random distance from me and then walk around taking shots from different distances and angles. When I make contact the ball makes a nice "thunk" sound and bounces back five or six feet. Sometimes I stand in one place and toss the ball a short distance away and then keep shooting from the same spot until I've knocked the ball to the far corner of the yard. Either way I figure if I can hit the ball I can hit a deer.