just wanted to say what a good bbl criterion is( and how happy i am with my 15 year old daughter). 9-4-11 at Chattanooga rifle club shooting her first match in f class open (first relay was 300 yards and last two were 500 yards)she shot 450-22x out of 450 with a old flatback long action and 6br criterion bull bbl. the barrel only had about 75 rounds on it before the match. of course the conditions were good during her relays but heck i cant keep my composure for three relays lol... couldnt be happier.