Will jumbo grip affect swing speed on driver?: original inquiry on GolfWRX on 05/30/2019
Sadly and hilariously at the same time, both Stuart and Howard (along with many others) regularly acknowledge that really bad and incorrect information continues to be taught and/or spread regarding clubfitting, yet they themselves often post inaccurate information and continue to perpetuate such erroneous matter about multiple subjects.
Just one of these subjects (but hardly the only one) is swingweight. This epitomizes why the clubfitting industry has been and continues to be such an unqualified joke, glaringly displaying a situation that continues to embarrass the entire game and influence more and more people to find some other activity more worthy of their time and effort.
Based on their written explanations, neither Stuart nor Howard has ever personally been able to experience first hand how swingweight does and is meant to function, perhaps because their personal golfing motions have never technically matched up well with the specification’s design (which very broadly tends to favor more practiced players). This is why their beliefs about swingweighting lack sound logic, prompting many to shake their heads in distrust amid growing trade infamy.
This often happens among so-called clubfitters that are more book-taught and do not have sufficient practical performing experience to reliably compare against theories they think they correctly learned from others. So they are reduced to just blindly repeating whatever (often equally blind) people before them stated (like but hardly limited to swingweighting being meant as a form of MOI [Moment of Insanity] club matching, a complete fallacy).
Anyway, swingweight scale readings are not incorrect or fooled as grip weight changes. The workable swingweight value of a golf club is just as the scale reads, grip installed and all, and with the true swingweight value of a club changing as grip weight changes. This is how it ultimately works for most golfers whose swings have developed normally, just as the scale was developed by its inventor (helped by select best golfers of the day).
In correct theory, a completed golf club as measured by a swingweight scale is the only swingweight value that matters. Do not try to make it more complex than that, because on a foundational level it is not (though ably proceeding from there does become slightly more involved). Anyone stating differently is red-flag deficient in properly knowing not just one but two topics, both clubfitting and how decent swing performance develops.
I hope this inspires fr8dog to stay in the game and not get too discouraged by the glut of uniformed responses by others that promote failure and needless confusion among golfers. I mean honestly, one can easily look back now and state how ignorant people were when virtually everyone on the planet truly believed the world was flat (amusing to many now, but not very amusing then and relatively not all that long ago). Many in golf think they are too smart for such a thing to happen to them, yet it is happening to them right now.
Not meaning to dismiss or hijack kody17’s original inquiry, it would largely depend upon which grip size (midsize or jumbo) is a better fit for your present swing mechanics. (The grip pressure concept is another farce within the clubfitting trade, silliness that might be comparable with choosing your shaft based on the pressure of the underwear being worn). Without being able to actually observe your swing and check out a thing or two, it would be pure guesswork attempting a more definitive answer.
If you are not able to determine the answer on your own (no launch monitor is needed) and generally do not trust the clubfitting industry (a well-grounded view that has rightly become more widespread in more recent times), then consider searching for a qualified clubfitting consultant. On a personal or business level, that could help you conquer the comedy of errors still being made by the commercial trade and achieve greater success.