Shaft weight affect on swing weight

How many grams of shaft weight increase will equal one swingwieght? I've researched this online and have a range of answers. Most numbers I've seen range from 7-9 grams. That is to say, an increase in 7-9 grams of shaft weight will increase the swingweight one point. I'm doing the math here on a reshaft and would like a more specific number. Any opinions or factual knowledge would be appreciated.

Bouns question: Does anyone know the stock graphite shaft weight of a Nike CPR hybrid wood? (not the CPR2 with IRod shaft or the CPR3).

Thanks.

Re: Shaft weight affect on swing weight

[QUOTE=rebby;190861]From: http://www.equip2golf.com/clubmaking...tml~clubmaking

Thanks!
It seems 9 grams is the number I see most often.

I know what you mean. I played a 55 stock shaft in a Launcher once and replaced it with a 55 Aldila green NV and both of them just made me way too quick. Pull-hook city. Now I know the lightest I can go is 65 and still maintain control. That’s what I have in my driver and hybrid, but my 5+ wood has the stock 75.

That’s good advice. I play TT Dynamic Gold R300s in my irons and the "wedge flex" in my wedges which is really a S200 I think. But everything in my bag down to the 9 iron swingweights at D2. Lucky or not I can actually feel a swingweight change of 2 points, probably not 1 though, I think few people can. So I want to make sure I don't get way out of whack on my reshaft.

What I'm really looking for is something between my 65-75 gram graphite wood shafts, and the 120ish iron and wedges shafts. I have a NIKE CPR 26* wood I am thinking of putting back in the bag. It had a really tip active graphite UST made shaft. This club hits the ball SOOOO high. But If I want to pound on a shot, it just hits higher and actually goes less distance, i.e. balloons. What I want to do is try a light weight steel shaft to keep the ball down a bit more and also to give me more control into the greens. Also I love to chip/fringe putt with this thing.

I'm thinking about a True Temper Dynamic Gold SL in R300. Maybe you guys can check my math?

ASSUMING the stock, whippy feeling graphite shaft is around 65 grams.....

106 grams on the TT DL SL
- 65 grams on the stock CPR
-----
41 grams difference
41 divided by 9 to get the swingweight change is 4.55 higher swingweight.
1 inch shorter shaft length DECREASES swingweight by 6 points
SO MY CONCLUSION IS.....I would need to shorten the shaft 3/4" from 38 1/2" to 37 3/4" to keep me in the same ballpark on swing weight. This would be exactly 1/2" longer shaft than my 6 iron, so that would be perfect in my set.

Math class is over. Would anyone into club building be willing to check my math on that one? Thanks guys for the previous responses, and to anyone else willing to help.