A number of years back I took possession of both a NMBH and a 625 Mountain Gun ; both SS 45 Colts. Hadn't read Brian Peace's 2007 article yet. I developed identical 335 gr LBT loads running about 1100 fps in both. Both shot very well but it quickly become evident the Smith was not up to the task ;becoming difficult to open. Internal parts were getting beat, peened beyond specs. Had a local, yet respected'Smith clean it up so I could send it on it's way.
Safe? Likely! Suggested? No!
Alan
