BAck in the 1980's, when auto's were just on the horizon as duty guns, I was told at FLETC that a fed organization (Border Patrol or Treasury maybe, maybe the academy staff) had shot the assorted K type frames (Colt, Smith, Ruger) till failure. The Rugers walked away with it.
I was in the BP back then.
The Colts were literally falling apart, the Rugers needed work and shot out of time significantly faster than the Smiths, I forget the ratio but it was 5 or 10 to one. That was the GP100's though. The Rugers would lock up when ran hard, unlike the Smiths.
We still had guy's using Model 19 no dashes in 1996 when we went to 40's.