Mike,
I'm glad that you enjoyed this project.
While I wait for the 8.15X46R reamer to arrive, I plan to finish the associated projects for this rifle which include a bushed firing pin (.070"), new main spring, spring loaded firing pin, a scope adapter for the Swiss rib, and a 8.15X46R adapter to fire the 32-20 cartridge.
I may make a .010" shim for under the case rim so that can fire form a few cases to headspace on the shoulder, as you suggest, especially if the reamer's delivery is prolonged.
Otto
