https://photos.app.goo.gl/Q4AHxEdiYQ5sjffH9 I believe this is how Bugs would hit this - center ball. Donnie Anderson the same but he would slam it if the rails play soft. Actually I should of said; "Eddie Taylor" instead of Bugs, for he likes to put a little fire in his bank.
With the ob that close to the rail and stroked at that speed then ob jumps off the rail and gives more room in clearing the cb.
The 6" is per diagram - from the rail to the center of the balls, not the edge. Which is 1/2 diamond on a 9' table. Each square is 3". So the ob is 1/2 diamond from the pocket w/ cb parallel.
I wanted to state this, for the point is uncommonly protruding out , which lends me to think this diagram program is off concerning the pockets. The pockets gives the elusion that there is little room to work the ob, as Steve points out.
Shorty,
keep them coming and thanks! Whitey