How do you predict CB direction when the CB doesn’t have stun, complete forward roll, or close to maximum draw?

For a stun shot, the 90° rule applies. For a rolling CB shot, the 30° rule applies. For a “good action” draw shot, the trisect system applies. For shots in between all of these different cases (i.e., “tweener” shots), the cue ball will go somewhere in between the indicated directions. The only way to get a feel for how much “in between” the cue ball will go is to practice … a lot! However, knowing the reference directions and how they correspond to different tip positions can help you judge the tip positions required for different CB directions, as demonstrated in the following video from Vol. I of the Video Encyclopedia of Pool Shots (VEPS):

For more info, see Vol. I and Vol. II of the Video Encyclopedia of Pool Shots (VEPS) and:

To see how speed and table conditions affects CB trajectories, see speed effects.

For more information, see where the CB goes for different types of shots.

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