I'm curious about this. I have a 2014 Callaway BB driver right now, and the head weight is something like 199g. I love the shaft I currently use. If I were to get a Cobra F6 (as an example) head, they weigh in at 208.5g. That's almost a 10g difference.

It is my understanding that having a heavier head on a shaft will make it a little softer flex. I guess my question is: how much weight difference does it take to make it significantly softer, and how much would it take to take it down a full flex?

Thanks fellas!

Different to each different swing and to each individual's feel. Plus the difference in the shafts.... too many variable to pin down how much weight added to the head will effect the flex.

Best to use lead tape added to the head 2 grams at a time to find out for yourself.

Although it's pretty safe to say, if you want a softer flex, get a softer flex of the same kind of shaft.

    Release

    Thanks for the lead tape idea.

    What I'm hoping for is to NOT have a softer flex.

        Hoss7504

        Adding weight to the head, longer length of shaft, counter weight ... would all make the flex feel softer.
        So if you want a stiffer feel. shorten the length would be the easiest way.
        Also heavier weighted shaft with the same brand ( eg. 70gm. vs 60 gm. from the same model ) will feel stiffer.

        So theoretically, with the same shaft mounted with a lighter head should feel stiffer.......at a cost of wider margin of error.

          9.5 gr. will soften up most shafts, esp. if it is R flex.
          (getting older)I've experimented with as much as 7 gr. and even that amount softened the shafts I was trying; I wanted to keep playing the same shaft, like you. Another thing I tried was getting the same shaft in the next stiffer flex, and adding the weight. It also worked OK, but depends on the shaft specs. For me, a stiffer tip shaft would feel too loose when doing this(in the R flex), so it is an experiment waiting to happen for you. I found I could play longer than normal length drivers/fw clubs, so less weight is now needed, but I always try to weight the heads around 202-204 gr..

          In your case, I might suggest getting the same shaft, you are now using, and tipping it an inch or so. Or trying the next flex up. Not sure if this helps for an answer.

          Let us know what the particular shaft, & flex, is you are wanting to use, if you don't mind saying.

            I forget but is it not about 2/3rds a CPM per one swingweight? Lead a head up 15 grams and the CPM drops about 10 CPM so close to one full flex.

            Hoss7504 Isn't that a soft feeling shaft to begin with(high launcher)? Never used one, but remember reading about them. And in Stiff, does it weigh around 70 gr.?

              I wouldn't say it's soft feeling, I'd say its about average for S (imo). But yeah it's roughly 70g and high launch. Feels really stable.

              I think the best thing to do is find the trimming instructions of that particular shaft and see what they recommend for a 3 wood as the weight of 208.5 is pretty close to standard 3 wood weight. I would guess it would probably mean a tip trim of .5", but every shaft is different

                Give feedback of your experiment, please .

                  I've got a new F6 head here with plastic, label and screw in it that only weighs 202g. Just saying.

                    LBlack14

                    I read some stuff that said F6 heads are 202-204g. But when I called Cobra they said the head weighed 208.5g. Gotta go with real life numbers, right?

                        LBlack14 LB, is that with the adaptor?(assuming it comes with one)
                        I always consider the adaptor as part of the head. Maybe some do not.