Suggestion from Musketman, I would remove the Pedersoli lock and give a good, long look at the inner works, make sure the screws are tight, sears are cut straight, springs are stout, that sort of things...
I'm not saying that Pedersoli Besses are bad, just the big difference between the Pedersoli and the other two would raise a red flag in my book...
Could be the way it was made, machining processes could have changed enough to make a smoother action...
Again, check the sear connection for the Pedersoli Bess, with an empty gun, pull the hammer (cock) to full cock position, you should hear a sound "click" as the sear engages the sear's notch on the tumbler...
Now, push forwards with your thumb on the back of the hammer, did the sear slip and the hammer fall?
If so, the sear notch is cut too shallow or there is a burr on the sear itself, or both...
The sear spring could also be too weak to allow the sear to engage the notch fully, please check these thing, after all, you wouldn't want to find these out when the gun is loaded...
Three Besses, eh... :redthumb: :redthumb: :redthumb:
