Most of the forcing cone areas show irregularities and roughness. It really shouldn't pose a problem. The cutters used to set the forcing cone angles load up quickly because the Smith barrel steel is very hard, and the tools dull quickly. It could be lapped, but that adds time and cost to the process. Plus on the j-frames, there is not much metal to work with for removal purposes.

Yes, a few drops of oil into the action will help flow debris out of the frame. The new guns are pretty dry internally- at least the new guns I've worked on.