Hi Dave, 

Thanks for the question.

If you were to cut your irons -1/2", these three things would happen:

1) They will become effectively stiffer, but not by a lot.

2) You will reduce the swing weight.

3) For every 1/2" a club is cut down or made shorter, the effective lie becomes 1 degree more flat.

Hope this helps.

Bubba

As long as the lie was never changed, it still measures the same as standard - 62.5 on the 6 iron.  The swingweight will be 2-3 swingweights lighter and the stiffness will be negligible - less than a 1/4 flex.  We would have built that set with standard heads unless there was a swingweight specification on the order so when you cut it back to standard length, it will be D2 +/-1 swingweight.

The swingweight is the most noticeable of the changes, however the others may impact your game slightly.  FWIW