Bow arm should never be locked-out. This causes your forearm to rotate inwards towards the string. It is also a symptom of too long of a draw length.The draw length isn't too long - of that I'm certain. I don't know - maybe I should bend my elbow a little that holds the bow? I'm told to keep my now are locked straight for better precision - I'm guessing that's part of the issue - or all of it.