(from Ron Shepard's "Everything You Always Wanted to Know About
Cue Ball Squirt, But Were Afraid to Ask")

1. How can squirt be minimized?
    By reducing the tip offset or by using a cue stick with a
    small endmass. 

2. Does shaft flexibility affect squirt?
    No, not directly.  Shaft flexibility may affect the endmass
    and thereby affect squirt indirectly, but this is probably a
    relatively minor effect.  This means that the player is able
    to choose a cue with a desired amount of shaft flexibility
    for other reasons, without having to compromise the squirt

3. Does tip curvature affect squirt?
    No, not according to the above analysis, except for the fact
    that the tip curvature affects the actual tip offset for a
    given shaft offset.  However, there are data at the Predator
    web site that suggests that a rounder tip (i.e.  a dime
    radius compared to the larger nickel radius) reduces squirt. 

4. Does squirt depend on shot speed?
    No, not directly.  Shot speed might affect the endmass, but
    this is probably a relatively minor effect.  The observation
    that different aiming is required for different shot speeds,
    particularly on longer shots, is probably due to cue ball
    swerve, not to squirt. 

5. Does squirt depend on the cue stick weight?
    Yes, but only when it affects the endmass.  Weight added more
    than about 10?  away from the tip apparently has little
    effect.  This means that the player is free to choose stick
    weight for other reasons without compromising squirt

6. Does squirt depend on the stick balance point?
    Yes, according to the rigid cone approximation, but only
    because it has a small effect on the endmass. 

7. Do ivory or brass ferrules have more squirt than synthetic
    If so, it is primarily because of the density of the material
    and the resulting effect on the endmass.  It appears unlikely
    that the hardness or other physical characteristics affect
    directly the squirt.  However, a thick brass ferrule will
    probably have more squirt than a thin brass ferrule.  Also,
    some ferrules are attached to the shaft with a metal screw or
    stud; these cues probably have larger squirt than an
    otherwise equivalent cue with a standard wood tenon. 

8. Does the tip diameter affect squirt?
    Yes, because smaller tips will have smaller endmass, all
    other things being equal.  This trend is predicted by the
    rigid cone model.  However, there are other ways to reduce
    endmass than by using a small tip diameter, such as the
    approach used by the Predator design. 

9. Does tip hardness affect squirt?
    No, not according to the above analysis.  This also suggests
    that the tip-ball contact time, which is related to tip
    hardness, does not directly affect squirt, but this has not
    been proven independently, and it is possible that contact
    time does play at least a minor role in determining the
    effective endmass through speed-of-sound mechanisms.  To the
    extent that tip hardness is independent of squirt, this means
    that the player is free to choose tip hardness based on
    personal preference without compromising the squirt

10. Is squirt caused by the tip slipping on the ball?
    No, squirt occurs even when the tip does not slip.  The tip
    does not slip on normal shots. 

11.  Are there any stroke techniques that can be used to minimize
    No, not unless the technique somehow reduces the tip offset,
    in which case the same shot could have been achieved simply
    by stroking normally and using the smaller tip offset in the
    first place. 

12. Is it better to use an open bridge than a closed bridge?
    It is possible that a tight closed bridge might increase the
    effective endmass, and thereby increase squirt, but this is
    probably a very minor effect. 

13. For a given cue stick, will snooker balls squirt more than pool 
balls, and will carom balls squirt less?
    There are two separate effects, mass and ball diameter.  Due
    to the ball/tip mass ratio, the lighter snooker balls will
    tend to squirt more than pool balls, and the heavier carom
    balls will tend to squirt less.  Futhermore, the stick pivot
    point depends on the ball radius, so, for a given relative
    tip offset and ball/tip mass ratio, the larger balls will
    tend to have longer stick pivot points. 

14. If I use a low-squirt cue, must I suffer from excessive or sensitive 
    All other things being equal, high-squirt cues will appear to
    get slightly less spin (and speed) than a low-squirt cue for
    a given tip offset, but this is a very minor effect, smaller,
    for example, than the differences in tip curvature between
    two tips might affect the amount of sidespin. 

15. Does the amount of shaft bend, buckle, or vibration affect squirt? 
    No, the shaft is set into motion as the tip strikes the ball,
    but the actual bending and/or buckling occurs after the short
    tip-ball contact time.  If the ball has already separated
    from the tip before the bending occurs, then the bending and
    buckling can have no effect on the ball. 

16. Must I trust the advertising of the cue makers to tell me how much 
squirt a stick will have?
    No, the aim-and-pivot squirt test is a reliable way to
    determine squirt, it requires no special equipment, and with
    a little practice, it can be performed by anyone with a
    reasonably straight stroke. 

17. What is the optimal squirt characteristics for a break cue?
    The stick pivot point should be at the bridge length.  For
    most players, this will be typically in the 14-inch to 16-
    inch range.