I have an FN with the adjustable rear sight. I do seem to shoot to the left and probably, because I'm a bit of a trigger "slapper". My question relates to how one adjusts the sights on the FN - do you shoot free hand and makes adjustments off of a 3-5 shot pattern - or use something like a ransom rest to take the shooter out of the equation? Certainly, if my problem is me and not the gun, I want to learn better technique, but if it's the gun, then I want to adjust the sight. Any suggestions?