Had an interesting shoot tonight. The sights have been shooting low as a rule with the rear sight on the highest setting. Last night I milled the front down about .200" and it is now shooting great vertically but couldn't help but notice something changed regulation. The Winchesters seem to now be uncrossed and the federal truballs went from a barrel respective 6" spread to a 10" spread. Seems as though that small amount of weight on barrel ends really effected regulation. Beware of front sight changes!!!!!! On a good note 1 oz at 1600 is regulated. Now to find a good handload that matches the factory offering. Getting close now.