I am hoping someone who has had a gun professionally fit, or someone who knows how to fit a gun, can tell me how the shooter is measured for stock pitch? I know there is a tool that is used to measure the pitch of a guns stock, but I am wondering how the shooter is measured to establish his specific comfortable pitch? If a gun with a fully adjustable stock is used, is this gun shot to see if the pitch is comfortable or is a measurement just made while the shooter holds the gun? Thanks in advance! Kurt