If this is the one you are using, I blame it on the butt plate & recoil pad design !
http://www.franchiusa.com/firearms/i-12_waterfowl.php
I loved the "new"' at the time Browning Cynergy O/U, but the original had the same design.
http://www.browning.com/products/cat...field-firearms
So, when they came out the following year with the classic stock/butt plate; I brought one (o/u that is).
http://www.browning.com/products/cat...field-firearms
You may have seen my previous post - I use my Beretta Extrema for a turkey & waterfowl gun !