True story:
S&W recent production 686. I bought it new in about 2010.
Action pistol range, first day out. No end of 'throw by'.
Warranty replaced cylinder, bolt, and hand.
Next range session, 'throw by' cured but no-bangie after 100 rounds.
I pulled the grips, and the mainspring tension screw had backed itself out.
Super Locktite cured that, but I did send them a very polite e-mail.
'Hey guys... these are sold as weapons. Your customers might not appreciate the lack of mainspring tension in a critical situation. You've been building revolvers for how long? Ever hear of thread locker? Or perhaps lock washers? '
Response was 'We'll forward that suggestion to the production floor'.
As a PS, a friend bought two revolvers about that time frame, a 625 and a 686. The 686 was fine, but the 625 quit firing at 400 rounds. Mainspring strain screw.
If you carry a S&W for social reasons, it might be worth checking that little detail.
