My rifle has an L&R Queene Anne Lock. I have a question concerning returning the cock to "half cock" from the "full cock" position. I've noticed that I have to drop the cock past the half cock position and then return it to the half cock position in order for it to hold securely. If I stop at half cock without passing and returning, the cock will drop forward when finger pressure is applied. Is this normal, or do I have a faulty lock?