I had friends that had events with 682's. An old DR friend double charged some 1 1/8 reloads and when he shot one the first one pushed him down to the ground! , NO damage to the gun. Another fellow blew up a tube at the muzzel. He returned the gun and the factory cut off the tubes behind the damage, crushed the barrels in a vise and sent it back. I would talk to both vendors but watch out on loosing control of evidence.
Is it a reflection causing the gold colored band or a seam in the tubing stock?
bill