Question regarding Mizuno demo iron (6i) vs. purchased mizuno iron set - different swing weight?

[ERdiesel]

Hopefully this is not a strange question, but i've been looking to go from my mp-62 to full blade mp-68's and using the mizuno demo club (6i) i played around with the DG, PX, and KBS shafts.  I found the KBS shafts the "smoothest" feeling for my swing out of the bunch.  My mp-62's that I have had for almost 2 years had DG s300 shafts, and I never really got a good feel for the shaft, and sometimes i would get a higher than "normal" ball flight.  I know that the KBS tour shafts are supposed to launch higher with more spin, as opposed to the DG more "penetrating" ball flight, but I found that the ball flight with the KBS shafts were much better for me overall.  I tried both the stiff and x flex kbs shafts with the mp-68 demo head and actually found that i loved the x flex shaft, i could really go after the ball more effectively.  After several days of trying all the different shafts, i was told to use the mizuno shaft optimizer, which i did, and it recommended as one of the chocies, kbs tour X flex soft stepped once.  However, since there was no soft stepped kbs tour x shaft in the mizuno demo kit for me to "try" out, I was extremely hesistant to purchase.  I went ahead and ordered the x flex kbs instead with no soft stepping since this was the shaft that felt the best for me when trying all the different shafts.  I received the clubs, and I love them, however, the question that I have is, for some reason, the clubs feel a bit "heavier" than the demo mp-68 club with the same kbs x flex shaft in it?  Is this a swing weight issue?  My clubs are all standard lenght, lie, loft, etc., but could the demo mp 68 6i with the x kbs tour shaft have a different swing weight than the purchased mp 68 6i x kbs tour shaft that accounts for the "heavier" feeling even though the weight should be identical?  If so, what impact can I expect this difference to have aside from just "feeling" different.  Also, any way to get the same "feeling" I had with the actual 6i demo club?  Thanks.

[Shindig]

I don't know if this will help you or not, but I recently (well, last September) re-shafted my MP-57s.  I bought a demo iron from a bin at Roger Dunn cheap, and re-shafted that to the shaft I was considering (KBS Tour Stiff, soft stepped once).  I liked it, and re-shafted the rest of my set... except the 6-iron from my set, which is in my closet with the original R300 shaft.  If I decide to re-shaft again, I'll re-shaft that to find the one I want, and then I'll re-shaft the rest of the set around it.  But I haven't noticed any different feel in my "new" 6-iron than the rest, even though that came out of a demo iron (but not a demo kit).

[ERdiesel]

the demo club I am referring to is from their fitting cart, where they can unscrew and screw in different shafts to the club head easily.  I'm wondering if the fitting cart 6i is a tad bit different (not a fixed shaft, but removable shafts) accounting for the different feel from the actual production 6i?

[mdrengl]

Not sure, but are you using the same grips as the demo? In the Mizuno fitting carts, the shafts have a color on the butt end - did the demo shaft have a white or yellow butt? A yellow butt is +1/2", white is standard.

If all is the same, I wonder if the interchangeable heads really effect the swing weight significantly... I'll check and see tomorrow when I'm at Golfsmith.

[ERdiesel]

Yes same grip, i specifically wanted the exact same setup because it felt so great hitting with that demo club, so the grip is the standard golf pride m-21 grip made specifically for mizuno.  Also, the shafts that I tried were the standard (white at the end of grip) shafts. I am 100% sure because I helped the guy find the shaft that I wanted to try out.

maybe it's my head playing tricks on me or i just happened to have played too many consecutive days when i received them and put them into play?  I haven't picked up my clubs since monday to rest, and i guess will give it another go tomorrow or Friday to see.