I owned a Sabatti o/u combo in 12/308. It was a bit clubby handling, but it was the MOST accurate combo gun I've ever owned. I gave it to my boyhood friend and still hunting partner. I commonly shot 3/4" 3 shot groups at 100 yds with Remington factory ammo and just a tad smaller with handloads. It had an older Bushnell Scope Chief 3x9 on it.
Jim has killed several moose, and many caribou and grouse with it. The gun has functioned flawlessly.