Shoot several rounds then inspect your patches. Pedersoli rifle barrels are notorious for being sharp and cutting patches, which will mess with the accuracy until you shoot it in. I've always used a generic pad of "scotch bright" aka "green scrubbie" when this was the case, and the problem was corrected in an afternoon.
The barrels from Pedersoli, though, are not consistant from the factory with sharp lands, so inspect the patches before you do any polishing.
LD