Kind of new to rimfires and just love my C Z Ultra's ,noticed in my "Precision Shooting" magazine a gauge by Bald Eagle, to measure rim thickness for sorting bullets , they claim that group sizes can be reduced by 25% also wondering If anyone sorts bullets by weight which they claim also reduces group size. I know these are pretty extreme measures and mainly I just like to "plink" ,( no reloading is great ), but sometimes I shoot with some guys that can "HOWL PRETTY LOUD" when they, one upped me . So if theres something I can do while watching T V to help keep there voices "DOWN" . Well I guess I was wondering if there were any other "extreme accuracy nuts" "out there" that have tried either of these methods.