As far as double action revolvers, S&W pistols are not that hard to work over and get a good, consistent, effective trigger pull. As they come from the factory, S&W triggers are horrible but they can be fixed by a good competent gunsmith familiar with that type of action. I don't know about the other makes of revolvers, this is the one I am familiar with. Competition shooters do this all the time with no problems. Don't let just anyone who says they know how to do the job, mess with it. When I was competing in PPC, that is what all shooters did, find a good gunsmith to do a quality safe trigger job. I still have a Model 14 that we used in the mid-70's and still going strong.