[Ricklin]

I saw a procedure online while researching my latest acquisition, an H+R hammerless that is unfired from new.

I do remember the test that was recommended. Remove only the grips and clamp the grip frame in padded vice jaws. By hand apply upward pressure on the bottom of the barrel while pulling the trigger.

There is a simple fix should the revolver function well with pressure on the bottom of the barrel while held firmly in the vise.
I do wish I could recall the fix. Sorry, but perhaps another might be able to help on that.