robhof
I have a Dan Wesson Supermag 357 that Ruger discontinued their version because of the flame cutting of the top strap and throat erosion, Dw just offered a spare barrel and after years of ram shooting competition, it was found to be a self stopping problem, even many of the old Rugers are still competing, the gas burning process also heat hardens the area and stops after a short time, at least that's what the DW smith that I talked to when I got my gun said. I've had it since 1992 and shot many rounds through it and it still hasn't gotten any worse than when I 1st got it used. I would believe this would also apply to the Colts as cut arbors would be a problem with many used in CAS competition for years.