No, this isn't another Fat Bastards thread!, this one is about club weight and heft/feel (swingweight).
Contrary to the popularity of lighter clubs, I have gone the other way and I am finding it is agreeing with my swing a lot. Historically I was playing my irons 1/2 to 3/4" over standard (193cm), but I have snuck this out to 1 and 1/4" over recently. The shafts I have been using were around the 95 to 105 grams level, but recent purchases have come with R300s, and the additional 15/20 grams seems to be agreeing with me also. Net result is I am playing with irons that are around 20 grams or so heavier, with SWs of between D6 and D8, and I haven't hit the ball better. I seem to be finding somewhere near the centre of the club face a lot more often, and my ball striking has improved accordingly. This is even though I have moved to more player type irons, with much lower forgiveness.
The trigger for the experiment was a set of lightweight clubs, X Hot irons with the 65gram graphite shafts. I picked up a set of these earlier in the year and simply could not hit them. I seemed to have no idea where the club face was. I knew it wasn't the clubs per se, but after a discussion with a club maker friend decided to go the other way, hence the Heavy and Hefty.
Next step is to try a set of R400s, and then perhaps some back weighting. I would also love to have an MOI Analyser!, perhaps a Christmas present for myself!