That is a reasonable explanation. It does, however, come at a cost. That being greater aggravation in reloading.
I am cautious not to carry a doublegun open and let it "bounce". The longer the barrels (which I favor) the greater the strain on the barrel lug as the gun is carried open. Allowing the mainsprings to cushion some of that stress makes a lot of sense. I used to think a good way to carry a hammergun, while bird hunting, was loaded, hammers back and breech open. I now have serious misgivings about that.
SRH
