This. Savage does not run heavy barrels in their shotguns so you should not fire it if there is any damage to the barrel.If this is a new gun I would call up Savage right now and report the issue to them. I would not fire the gun in that condition.
It's an obstruction that can cause metal fatigue. The gun can be fired, but eventually the barrel will rupture if it's not fixed.I bought this gun at the gun show the guy said it was new but when i ran a brush through i saw that it had been shot so i believe itll fire with no issues but would this small burr cause overpressure or be considered a barrel obstruction