50/1000" ~ 60/1000" is a good action but don't press the string down at the first fret to measure it. When you play you feel the action as is not with it pressed down at fret one. Action is about feel at the end of the set up and many things play a part and directly affect the hight of the strings. Relief and nut hight need to be right ,in fact the relief needs to be right BEFORE you cut the nut slot depth. So string it up set the truss rod, cut the nut to the right depth THEN set the saddles to the hight 50~60 1/1000" then intonate 3rd to 15th fret fretted notes and if your guitar has NO issues it should be good to go. The tighter the radius the more perfect everything needs to be to work at this setting and you may need slightly straighter neck (almost perfectly flat) to be able to get a three semitone bend on the high E. Or a higher action just to get the same next fret clearance. A big mistake many make is to increase the relief if it buzzes because all you are doing is moving the buzz. In terms of geometry for the guitar perfectly flat fingerboard is best and everything gets worse as you add to the radius. The flatter the board always improves the next fret clearance at the same action with everything else set the same. The effect of this can be a low action on a 20" radius allows the same amplitude as a medium high one on a 7.25".
