This is the first of a 3-part series on using sidespin. When you shoot with sidespin, there are three elements that can affect your line of aim: squirt, swerve, and throw. These effects are more noticeable at longer distances and with faster stroke speeds. Due to the inconsistencies of using sidespin, only use sidespin when absolutely necessary!
Squirt (Cue Ball Deflection)
Sidespin will change the line of aim of the cue ball in the opposite direction of the spin, depending on your tip contact, stroke speed, and cue stick. The diagram below shows right spin causing the cue ball to squirt to the left — as seen from above.
Larger tip offsets and faster stroke speeds will result in more squirt. Using a low deflection shaft can reduce the amount of squirt produced.
There is no guaranteed system for compensating your aim for squirt, so the best method is to PRACTICE! Use the shots in Bullseye Billiards to systematically understand how squirt works for various tip contacts, stroke speeds, and your equipment.
For more information on squirt and aim compensation, visit Dr. Dave's Billiard Resources page.