[aa1911]

Stock fit is very important, it has to fit correct or it will be a neverending frustration. Don't be afraid to chop and modify on your gun, no matter how expensive; a $10k shotgun that doesn't fit is worthless, cut or add length and cheek weld as needed.

One method is to try using an old sheet; hang it up somewhere vertical and paint a "+" sign thru the entire thing. Take a box of shells and one at a time, bring the gun up and fire quickly at the crosshair center without deliberately aiming. (try about 15-20yds) Repeat until finished and look at where the majority of the damage is; this will tell you your natural point of aim with that gun and will allow you to make adjustments from there. I suppose a pattern board could be useful there as well.