The joint on the exterior of the barrels is 2-5/16" from the barrel breechface and the corrosion rings is about 2-3/4" from the barrel breechface.

For the corrosion ring to be at the tube/block juncture the tubes would have had to have been opened up to accept stubs from the block which would have extended 7/16" into the tubes.

The corrosion is actually pretty light and would probably polish out.

My problem lies in reconciling my gross habits with my net income.
- Errol Flynn