Originally Posted by Robf
cant is also a factor
Now, now...Rog is a lovely chap!
I doubt it'd account for your findings Rog but for academic interest, ballistic coefficient is a factor in windage. Ballistic coefficient is affected by lots of things including the barrel. You'll get different BCs from the same pellet running at the same velocity from different guns.
Double the windage though, with a faster velocity? Nope I think Pete's on to something!