I just got my 357 mag barrel back from NEF today. Wow, what's up with the stupid chamber? I made a cast of it - no indication where the case ends and the throat starts. At least .550" of forcing cone. Neat. My first thought was .357 Max, or maybe 35-30-30 AI or 35-30-40 Krag or who knows. What are folks' favorite chambers for these barrels that will clean up the mess the factory makes and be useful?