That's a long way more than I can hit. It is a short par 4 (289 yards off the yellows), the hole is all about thinking your way through with accurate positioning. I made one of those easy, effortless swings off the tee just to keep it in play and as is often the case with those swings, it came out of the sweet spot and just flew dead straight around 15 yards beyond my 'normal' 150 yds 6i. I made the same swing with a 9i and it worked again.
There's something in this 'swing easy to hit hard' business
On a slightly related subject, have you come across Robin Matthews-Williams on Youtube?
He's a 'maverick' freelance instructor, very sweary so be careful where you listen, who turns up at your driving range for under the counter lessons. He had a run in with the PGA about his teaching methods hence his 'pirate' status. He teaches a very simple "swing back, swing through shoulder to shoulder" swing based on (ripped off) FlowMotion Golf
One of his videos is him getting fitted for clubs. To cut a long but interesting story short, his 7i improved from 175 carry to 203 with much better dispersion, and the swing he used was nothing like the one he teaches.
He's very controversial but worth searching out, even if only for his rather radical takes on the game. I will say that whether or not he uses his taught swing, his customers do seem to like the results.