I purchased a Fabarms Sporting Target Model, O/U, then imported by HK. The gun patterned top barrel 55/45 above center the bottom barrel 20/80 per their factory tests and they said it was within factory spec's. This is a target gun. At a local shooting fair I met the HK rep and told him I was prepared to
1. sue HK in small calims court for selling a target gun which failed to be satisfactory for it's intended purpose, 2. To wear a sandwich board at future fairs and exhibits with the pattening sheets attached to draw attention to the lack of convergence.
The rep being of a cooler head than mine asked what I wanted and I said a Briley choke job for one barrel or replacement. He called back the next day and told me to again send the gun back to HK and the sent back a new gun. Does the new gun suffer from nonconvergence? Yes but not as bad as the first. I have to shoot the bottom barrel for the 2nd or fall away bird on trap doubles and hence reverse the order of shooting. Open barrel on top, tight barrel on the bottom.
