Gentlemen,....I would like to know some of the factors that determine accuracy of an airgun, not the shooter.....I'm working with 2 Crosman 38t's in .22 cal (1st variant, all metal).....I securely clamped each one,in turn, and shot into a heavy blank cardboard at 30' (I'm not metric!).......Each gave me a pattern the size of a quarter(Cdn).....The object was to adjust the sights to the pattern......I only had Crosman Premier hollow point hunting pellets, which were a loose fit in the cylinder.....Fresh CO2 carts, warm day........Shouldn't the pattern be smaller at 30' with the guns held solid?.....Does the type of pellet make a difference?....Both guns are in excellent condition...........As an added note, I drew bullseyes around the patterns and said it was 50' just so my boys would be intimidated (we're fairly competitive and I always need an 'edge',eh?)....Thumper