That other thread says it all.

But based on the amount of crud seen in the case head recesses, check in particulary for crud in the cyl notches that keep the cyl stop bolt from seating all the way into the cyl notches. Therefore the cyl stop bolt can slip in and right back out of the notch due to the centrifugal force of the cyl rotation. When that happens and the gun doesn't fire because the cyl chambers are misaligned with the firing pin and barrel, a less than knowledgeable shooter will continue to pull the trigger in hopes of getting the gun to fire. But all they do is continue to do damage by denting the cyl because the firing pin is not landing on the case rim.

Not worth the expense of replacing cyl and not needed. S&W won't work on a gun that old either. What you might have to do is remove the dings in the edges of the case head recesses if the cartridges will not go all the way into the chambers.

__________________
Jim
S&WCA #819