It's not really possible to transfer much of the propane to a smaller tank without a pump. You'd be better off getting a piece of soft copper tubing or the newer flexible gas line to connect your tank to your grill. How far from your tank to your grill?
Most of the propane in your tank is a liquid. As you draw off gas propane some of the liquid propane turns to gas to replace it. If you pay attention at a propane filling station they have an electric pump that draws from the bottom of their tank.