What’s the purpose of an atlatl weight? Here’s a video of Bob Berg discussing his theory on why atlatl weights (boat stones) are a counterbalance for heavy darts. Bob doesn’t believe that weights are for adding more “power” or “speed” to your atlatl throw, as many have theorized, but actually to make holding a loaded dart more comfortable and balanced while hunting. Bob also explains why bannerstones are not atlatl weights.