I recently had the CMP custom shop put together a BEAUTIFUL 1903 1941 USMC Sniper clone. Shoots like a dream. When I received it, I gave it a cursory check that included a MW/TE measurement. It had a ZERO muzzle and a 1 or so throat upon receipt. After firing EXACTLY 489 rounds, the MW reading is now a 1. I would not have expected this much change after such a minimal round count. No. It is not over exuberant cleaning rod wear. Thoughts?