I posted this in a different forum but thought it would be more visible here, sorry for the double post.... I have a question that has arisen out of my quest for ultimate accuracy and tighter and tighter groups by tweeking my handloads. At what point do I stop looking at variation in the load process and/or components and start to consider that perhaps I have reached the limit of my personal ability? I'm in my 50's and have worn glasses all of my adult life. At the urging of my children I had Lasik surgery performed on my eyes and noticed an immediate 20% (or better) reduction in group size, across the board on three rifles that have had no change in load or components. The improvement can only be explained by the change in my eyes. So this observation has got me thinking on other aspects of my personal abilities.