Might have been set up for a left handed shooter, triggers now reversed. I bought a .410 which was set up full on right side and cup on left side. Triggered were bent for left handed shooter and reversed, front trigger fired the left barrel. It was a Crescent double so not a custom gun. Took five minutes to reverse triggers and rebend them for right handed shooter.
Some trap shooters I knew shot doubles using a tighter first barrel and more open second barrel. I guess they figured a full choke on the straight away bird was ok and having a open second barrel for the angles gave them a great pattern. As you may know a few Trap shooters can have odd ideas. Knew one who bent their barel up like a banana so he could shoot under the bird and the bent barrel would raise his point of impact enough to hit the bird. Like I said a few odd fellows over in Trap.
