not seeing you bowl it's hard to tell ya how to drill a ball,..but If I was drilling that ball for me, and wanted that reaction,..I do 5 x 4 (or 3 1/2),.with the pin over the fingers,..which for me is usually in the middle of the fingers,..if it needs a hole for legality,..I'd go 6" straight over on the span midline,..and keep it small,..but thats' just me,..that's one of my favorite drills,...The box shine should be fine,...jim