Actually, if it really is a closed, screw-in breech plug, Sixgun is correct. The breech plug will contain the pressure and the barrel will be put in tension for a time (until the bullet exits and the pressure drops). Of course, he'd better have a good grip on that barrel to handle the recoil, and the primer will likely shoot out when the hammer rebounds, but other than that no harm will fall to him. It's a matter of physics, and I don't see why the 209x.45 barrel couldn't safely be used on any Contender frame if the pin were ground off. Since the breech plug contains the pressure, with the only backthrust coming from the small diameter primer and the recoil, there shouldn't be any problem. The recoil is the only force needing resistance and it would be resisted by both the standing breech and the hinge pin that secures the barrel, so the frame between the hinge pin and the standing breech would all be in compression except for the small thrust of the primer. This is decidedly different from the case of, say a .454 Casull which we know to be too hot for the old Contender. In that case, the brass can stretch and the case head can exert a large force on the standing breech. This puts the area between the standing breech and the hinge pin in tension, which is why frames stretch when they are used outside their design parameters. This doesn't happen with the solid breech plug, since it and the barrel are essentially one unit.
Want to know what I think? Doesn't matter, I'm going to tell you anyhow. :lol: I think T/C wants to sell new frames. There is no way shooters are going to buy one if their old barrels won't fit, but T/C never marketed a 209x.45 barrel for the old frames, so they fix it so these new ones won't fit the old frames, and if we like this barrel, then we're gonna' have to buy a new frame. Marketing, simple as that. It sure ain't the physics of the matter. Sure, they don't want us to grind off the pin, but it is because they want to sell us a new frame, not because it's unsafe. That's what I think. You think what you want.
I would like to see Sixgun do what he said, and if he's a muscular, strong guy who I think can hang on to that barrel, I'll stand closer than Sean.
RonF