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CAN ANYONE TELL ME JUST WHAT A D2 SWING IS AND HOW DO THEY COME UP WITH ALL THE DIFFERENT SWING NUMBERS

D2 is a measure of swingweight. Swingweight is the measure of how a club "feels" throughout the swing. You could have two clubs (say a 5I) that weight exactly the same (in terms of total grams) but feel completely different. One may be head heavy and the other may be butt heavy.

I think A0 is the lightest and G9 or G10 is the heaviest. Most manufacturers produce clubs that are close to D0, D1, or D2. What does it do for you?

In theory you want all of your clubs to have swingweights that are the same or very close to the same. In doing so it allows you to become more consistent across the set as each club will feel the same. I had my set matched to D4 (which was the manufactured weight of my 4I). The reason I chose that club and its swingweight was because I hit it more consistently than any club in my bag. It took some adjusting for virtually every club but it made things more comfortable with every club and mentally I was reassured that each felt the same for every swing I took.

That's Good For You But That Doesn't Answer My Question
Suppose I Took My Seven Iron Head Weight Is 268gm The Shaft Is 80gm And The Grip Is 50gm That's 398 Grams What Is The Swing Weight And How Did You Come Up With It
Slammer13 There Must Be A Chart That Says 200gm Is An Ao Swing Weight And 400gm Is A G10 Swing Weight

You have all the weights, all you need now to estimate the swingweight using this link http://www.swingweightestimator.com is the length of the shaft.

By the way, a 200 gram club could be either an A0 swingweight, a G10 swingweight, or any swingweight in between, depending on where most of the weight is, either towards the head or towards the butt of the club. Likewise, a 400 gram club could be either an A0 swingweight, or a G10 swingweight, or any swingweight in between, depending on whether more of the weight is nearer the head or the butt. There is no chart that says "so many grams equals this particular swingweight," because that is not how swingweight operates. Swingweight, despite what it's name implies, is not a measure of weight of the club but is actually a measure of balance of where the weight of the club is located along it's length.

Thanks For The Info First Straight Answer I Got From Anyone I Guess A Lot Of People Are Confused On This Subject I Met A Lot Of People Who Told Me They Have A D2 Swing But They Can't Tell Me How They Came Up With It Except That Somebody Told Them
What You Said Seems To Make Sense Except Every Scale I've Seen Uses A 14"fulcrum As Thier Starting Point That Is The Standard So If You Put The Club On A Scale 14" From The Butt Like They Say Then All The Weight Is On The Head Side Lets Say You Hit A 8 Iron The Best What Do You Do Weigh The 8iron And Adjust The Rest Of The Set The Same Weight

The standard swingweight scale does use a 14" fulcrum, which is the point on the shaft 14" from the butt end of the club. That is the point they balance the club on. However, that 14" balance point is not the balance point of the entire club. There will be, of course, more weight towards the head of the club. If I understand correctly the 14" fulcrum was chosen as the balance point for swingweighting golf clubs because it provided the best ability to approximate a MOI matched a set of clubs using a static measurement. More information about that here: http://www.tutelman.com/golfclubs/swingweight.php?ref=

If you hit a certain 8-iron the best, the basic idea of swingweighting is that you then would measure the swingweight of that individual club and adjust the swingweights of the rest of your irons in your set to match the swingweight of that 8-iron.

I'm not confused on the subject. Maybe I didn't elaborate enough. You take the club to a proshop that has a swingweight scale. If 8I is your club you set it on the scale and get the swingweight measurement. From there you can add weight to the butt or head end of each of your clubs until they match the weight of the 8I.

By the way, when most people tell you they have a D2 (they are simply stating what they were told when they bought the clubs). D2, as I pointed out in my first post is a pretty standard number. If you took that set of "D2's" its highly unlikely that every club would be matched. I am guessing that 9 out of 10 golfers don't have a balanced swingweight across their entire set of irons.

True. I just bought a swingweight scale (I'm getting into clubbuilding myself) and measured the swingweights of the clubs in my current set of irons. The irons are supposed to be a D2 swingweight, but most of them actually aren't. However, none of the irons swingweight to less than a D1, nor more than D3 (most of them are pretty darn close to D2), so the're not off by all that much, considering that most golfers (I know that I can't) can't feel a difference of less than at least two swingweight points anyway.

I GOT IT NOW THANKS NOW FOR MY NEXT QUESTION YOUR RIGHT ABOUT MOST GOLFERS NOT BEING ABLE TO TELL THE DIFFERENCE BETWEEN A FEW GRAMS SO WHY USE HIGH PRICED SWING WEIGHT SCALES IT SEEMS TO ME A GOOD POSTAGE SCALE OR DIGITAL SCALE WOULD DO THE TRICK ANYBODY KNOW OF A GOOD SCALE I THINK THE SWINGWEIGHT SCALES ARE WAY OVERPRICED UNLESS YOUR FITTING PROS ALL I WANT TO DO IS MESS AROUND WITH MY OWN SET OF CLUBS AS A HOBBY BACK TO THE QUESTION ANYBODY KNOW WHERE I CAN GET A SCALE ANYBODY OUT THERE AROUND THE MYRTLE BEACH AREA I NEED SOMEONE TO PLAY GOLF WITH