Some lessons you learn the hard way. Bow hunting is all about form. Shooting exactly the same way every time regardless of the scenario. Your hat is changing your anchor point and that will change the aim point. You have it figured, either practice with the one you're wearing and adjust the sights accordingly or change so that your anchor point remains the same.
Form applies to everything from the waist up. You have to lock in every aspect of you shot. One common mistake is we practice on level ground and shoot from an elevated position. In your case it may be standing to practice and trying to shoot sitting down. In both cases you have to keep you arms in the same position as it relates to the body. When shooting from an elevated position it is easy to drop the arms instead of bending at the waiste which keeps your shooting form intact.
Good luck and hang in there.
If your to busy to go hunting, your just to busy.
Last edited by Buckshot; 10-09-2012 at 12:17 PM.