Of course no one on the internet can tell you if your barrels are safe. The evaluation requires the interest, equipment and expertise to be done properly, and if your gunsmith is unable to tell you the wall thickness at the end of the breech, the forcing cones, 9" from the breech, 9" from the muzzle, and the minimal wall thickness and where, you need another opinion. Let us know where you are and we might be able to recommend someone nearby.