Yes, I have a Pedersoli, and would not expect a fit "out of the box". Just figure I might have to ream it out to fit, assuming it's usually a case of the barrel being too thick or of greater diameter than the socket. ?? I have the "Ranger Carbine" and figure the muzzle is even a bit thicker than the full length musket. Do you know if that is usually the source of the fit-problem? Socket undersized for the barrel?
All the reproduction bayonets are made in India or Pakistan. The problem is that the dimensions (including, especially, the inside socket diameter) vary slightly from one example to the next. This is why I like Godwin as the source. He try-fits the bayonets to his sample guns, and defarbs them (removes the "India" markings).
If the socket is too tight, you can ream it out with emery cloth wrapped around a dowel. If it's too loose, there's not much you can do (maybe squeeze it in a vise).
For Civil War era bayonets, a better starting point is usually an original. Prior to the CW era, original bayonets are too expensive in comparison to the reproductions. (For this purpose, I include the M1842 bayonets in the CW era.)
I have half a dozen repro socket bayonets that I just couldn't get to fit acceptably. Chalk these up as lessons learned.
Here's my rack of reproduction muskets with socket bayonets. From left to right, Brown Bess, M1795 Springfield, M1816, M1842 (x2), M1855, M1861 (x2), M1861 Special, M1864. All the bayonets, except for the first three, are originals.