I bought a 360PD through the net, and it is at my local gunshop. The lock up is not very tight, but not horrid. Then I looked at the forcing cone, which is very bright, and looks like bare aluminum, which did not seem right. I did not bring a gauge to measure the gap.
All my other S&W are steel.
What should a forcing cone look like on a 360PD?
The foreign cone surface does not look like smooth stainless (like on my 686). I would not thing aluminum could survive. But much of this is alloys of scandium, so I don't know.