All my competition shotguns, mostly Perazzis, have single triggers. Despite this fact, I would never want a single trigger on a double rifle. If your shotgun fails to function, you get another chance.

To me, the big advantage of a double rifle is two separate lock mechanisms, so that if one fails, the other is still available. A single trigger negates that advantage, since failure by it causes you to lose both locks. Taylor refers to this in his "African Rifles and Cartridges."

Some people have difficulty with shifting from a single trigger shotgun to a double trigger shotgun, drilling, combination gun or double rifle. For whatever reason, I do not. I can switch from single to double triggers and from automatic or double shotguns to pumps without a bobble.

The answer is practice, practice, practice.