"Big" meaning anything larger than standard.
I'm a sweeper, more or less, and have always had the stupid 'laying the sod over' routine, hitting behind the ball tons more than just 'sweeping' it; mainly the reason for my bag having a lot of headcovers in it(hybrids). And, I've always used standard size grips. Shafts have been either, steel, graphite.
I recently got a new set of Apex 21 irons on a steal deal. They came new as can be, with Recoil Dart 75 shafts, F2(sr. flex). What wasn't mentioned was the midsize GP MCC +4 grips. They do feel like logs, but fit the hands perfectly, as indicated by 'experts'. Specs are 2* flat, and +1/2" for the clubs.
I'm killing this set of irons! Not hitting behind the ball, no 'rights' no 'lefts', just dead straight shots every time. WTF??
I've used graphite shafts plenty; I set my irons at 2* flat, +1/2" all the time. I've hit forged irons a lot, although these are smaller heads.
The only diff is I've never really tried the midsize grips, except on a SW. (which now, after writing this, I realize has been a deadly weapon, esp. from +/- 30 yds. .)
Could the grip have been the culprit for my non-famous game? For not allowing me to have the career we all dream of?π€£