If the gun shoots to point of aim, leave it alone and be happy. Fixed sight revolvers are sighted in by turning the barrels. It is not uncommon to find old model 10's with the sight off center for this reason. However, snubs are seldom sighted in this way. With a snub the procedure is to whack the barrel at the frame/yoke area with a heavy, soft lead rod and bend the frame a bit. I know that sounds extreme, but that's how it is done.
Shoot your revolver from a rest. If you aren't an expert shot, find someone who is and have him shoot it from a rest. If the gun shoots to point of aim, be glad. If it doesn't, have a reputable smith turn the barrel so the sight lines up properly or send the gun back to the factory.