I think so. You can also use the "Dremel fix" and do it yourself if the barrels are not too far off. Basically you shave off a tiny amount from the the muzzle in the direction where you want the shot to go.
Sabatti did this to regulate lower-cost double rifles and got badly burned for it - it's tacky to do this on a rifle since the bullet doesn't travel true but on a shotgun it doesn't matter.
I have never done this but have seen results of the technique.
If I were to do it I might try first using a triangular scraper - only a few tho need be removed from the crown.
If the shotgun warrants it, the only other recourse is to have the barrels re-regulated.
Hopefully others will comment on this - perhaps someone who has first-hand knowledge of this technique.
