I believe the prior comments about starting your forward cast too fast are right on. Remember you start slowly and continue to accelerate as you move through the stroke, ending with an abrupt stop. Here's a good analogy: Pretend that you have a big 6 inch paint brust loaded with paint and you want to throw the paint onto a wall in front of you without getting it on yourself or anywhere else. Think about that. You have to begin slowly and and stop abruptly to make that happen. The length of the stroke will vary depending on how much line you have in the air. The longer the line, the longer the stroke.