Bob,
Asking why use a slip stroke is somewhat like asking why play pool. A few make money at it, most play for pleasure. Speaking for myself, it is worth developing a slip stroke purely for the pleasure of using it and keeping the stroke alive. It is handy anytime a punch or jab stroke is called for, you can still have your same backstroke motion. Seems very useful on long straight in shots too, at least for myself and several others up to shortstop level that were playing with it one day.
On the technical side, I think there may be a real advantage to the slip stroke because it effectively lengthens your cue shaft on the final forward stroke. Using any other stroke other than a slip stroke or stroke slip, letting go of the cue as we go forward, we carefully practice our stroking motion then change it up on the final forward stroke since we are now going to follow through several inches or more. Very very few people don't feel a little change on that final forward stroke. That change is in the big muscles that guide the cue.
I think there is a valid argument that the slip stroke on the final back stroke allows the tip to contact the cue ball while your grip hand and arm are still in the exact same range of motion as all of your practice strokes. With practice the final stroke can be exactly the same as all of your prior strokes.
The slip stroke may be a little better or a little worse than the other common strokes or the benefits and debits might cancel out and all strokes be equal in benefits and issues to be overcome. I could certainly debate either side of that discussion with plenty of rationale behind either side.
Ultimately most of us play pool because we enjoy learning and using the skills involved. Learning different strokes can be a part of that. Seems like the old school players had an arsenal of strokes at their disposal and when we say they used a certain stroke we always have to qualify the statement with "most of the time" or "almost always". If not somebody is almost certain to have a piece of video where another stroke was used.
No overwhelming reason I know of to use a slip stroke. However, other than time invested to learn it, I can't think of any overwhelming reason not to use it most of the time either.
Hu
Hu:
How're you doing, my friend? Punchin' any manhole covers with .50 BMG lately? Need to do some more of that, myself.
On topic, I'm afraid I have to agree with Bob, for only one reason -- boiling the stroke down to SIMPLICITY. You might remember that I was a big-time slip-stroke advocate, and even wrote a tutorial here on AZB:
Part 1 of 2:
http://forums.azbilliards.com/showthread.php?p=2164385#post2164385
Part 2 of 2:
http://forums.azbilliards.com/showthread.php?p=2164387#post2164387
I was *so* comfortable with the slip stroke -- and as per rigid definition, sliding backwards with the grip hand on the pull-back in preparation for a re-grip on the forward delivery of the cue -- that I even attempted it on a snooker table. I found that even with my proud highly-honed slip stroke, there was a bit of a "jarring" motion when the hand came to a stop and regripped the cue. This induced the tiniest bit of yaw on my forward delivery.
When you compare this to a stationary grip on the cue (however light), the stationary grip gives your hand time to make an intimate connection to the surface of the cue. With the slip stroke, you never achieve that. Granted, most of the time, you'll see the classic slip-strokers of yore using Irish linen-wrapped cues, which aid in the slippage, and the idea of an intimate connection to the surface of the cue never materializes, nor is it thought to be needed. Remember, though, those are also the days of relaxed equipment specs, so looser tables translate to a general relaxing of fundamentals.
Getting back to my snooker table experience, I just couldn't get the slip stroke to work. I even reduced my previous "big slip" (of about 6 inches) to only 1 or 2 inches, and even then, I was missing more shots than I cared to. This was especially prevalent on long potting (i.e. 9 foot or longer pots) to that little pocket with rounded corners.
I had to abandon the slip stroke, and focus on making that intimate connection to the surface of the cue. "Feeling the cue" become one with my hand and arm, instead of the cue being an "instrument" that I'm propelling at the cue ball.
What that turned out to be, was a return to boiled-down basics. Getting rid of extra (and in this case, extraneous) movement. Removing one extraneous moving part -- i.e. the hand slippage/movement on the cue. Once I did that, I found my potting success increased dramatically.
When I went back to a pool table, I found that my "focused return to basics" translated well, and I didn't lose any of my potting performance on the pool table. In fact, I was more comfortable with my ability to control the cue ball (which the slip/regrip phase of the slip stroke kinda/sorta interfered with).
One thing I found that I'll unconsciously pull out the slip stroke for, is really amped-up draw or stun shots. I'll surprise myself when the slip stroke just comes out and says, "Tada! I'm still here!"
-Sean