Rocketman, you are starting to weird me out with your numbers stuff - Spinning every shotgun you can find to determine moments of inertia about multiple axis, reducing the world market place for all shotguns into a matrix, calculating Sd for your shooting scores. Do you have a shotgun with a laptop built into the buttstock or an HP calculator on your duck call lanyard? Final questions: - Is Rain Man your favorite movie and does your wife wears clothes with physics and statistics formulae printed on them? Come on this is shooting and it is for fun not statistical analysis! And I am not going to keep records on my shooting! It is embarrassing enough without statistical proof I don't practice enough.