I had three of these Weaver ( no gunsmith ) scope mounts on a couple of my handguns years ago. I didn't want to drill and tap the frame.
1- Older Ruger Redhawk 44 Mag- Never had a problem and stayed on zero.
2- Old Ruger Blackhawk 357 Mag- No problems and stayed on zero.
3- S&W 586-Shot competition with a Red Dot for years, again no problems.
I have taken these off my six-guns now and gone back to open sights ( less top heavy ). But I still have these mounts stored away just in case I need to use them again.