Well...7 iron on one of those machines at Golfers world.
worst 229m (251 yards)
best 240m (264 yards)
hit some dozen or 15 / 16 shots.
3 weeks ago at LD competition, hit my Titleist 910 D3 307.8m into the wind on a bog of a fairway. Very very disappointing.
Elevation here though is about 4500 feet above sea level.
Best with driver on course...par 4 downhill, some breeze (10 - 15km h) behind. GPS on cart left me 32m from pin on 416m (457 yard) hole. i.e. 386m total. (424.6 yards)
Now with X100 shafts and Hogan apex blades..7 iron is 220m average (with range finder to practice green..tend to go over it by a few yards), no wind..
with wind I use my 6 to pitch the flag.(204m)
Coastal...8 iron is typically 185m at my favourite driving range.