Larry,
A run of the mill English A & D boxlock is a better gun than just about any American double.
Agree with James that the same is true of a Robust, or a Costo.
Or, an R10.
Also agree that without those tarrifs, the American trade in guns would have went to bicycles, car parts, typewriters, and chain saws, before it did.
And the world would have been better for it.

Best,
Ted