Tightening up a revolver?

[Mr. 16 gauge]

I've always heard that one should shy away from brass framed cap & ball revolvers, because over time they will "shoot loose", and that those who wish to shoot their firearms should stick with steel frame revolvers.

Is it possible to "tighten up" a brass frame revolver after it does "shoot loose", or are you stuck with a wall hanger?

Also, if it is possible to tighten up a revolver, how much would something like this cost?

Thanks in advance.............