Errr excuse me but a slight correction is called for
measuring you fore-arm the way you did is at best a very rough guide to the required LOP
. To get a really correct measurement is far more involved as it takes into account you stature, build and a few other things. The only real way to find of have a gun fitted is by gettign together with someone who realy understands it. Good stockmakers should but not all do though
Gun fit or ptoper gun fit is more understood it seems in Clay shooting or driven game shooting elsewhere.