where the strings begin to buzz and choke. This usually indicates an up-bow that levels out where the neck meets the body. If the bridge has been dropped to compensate for the raised action, the guitar may play nicely, but only up to that point...
Remember, the truss rod adjustment is only one step in lowering or adjusting the action on your guitar. Do not keep tightening or loosening the rod if your guitar action is not ideal. All the truss rod does is straighten the neck. I laid out rest of the steps to completely set the act...