Groove for leather wrap

If its a new build I cut it after my final taper pass using the tail stock offset . I cut it in a few passes. I then do my finishing. After the finish I clean up the ends of the wrap groove with a single point cutter chucking up carefully just above the wrap. If I am cutting a wrap groove on a finished cue as an after thought I do the entire chanel single point, chucking above the wrap and using my taper bar. I do all my turning on metal lathes. The Porpers I reserve for sanding and finishing.

Taper bar or offset makes little difference. I would use a router to cut full groove except for last half inch or so at each end and finish that with single point tool once finish is on.

What Chris said above work best

Mario