I've never sent a Ruger back, though my M77 mk II 350 rem mag feeds like crap so should be tweeked by the factory. Never had a problem with a Ruger revolver or autoloader. Someone obviously skipped test firing these.
The question to the op is, would you be better off getting a new single 7 and then springing for another action job, or send the gun to a smith to properly chamber the cylinder on your gun with the action job. You might end up with a better gun, action job and nice tight chambers.
