5i for me. I typically hit it only from the fairway from 180-185ish, which is a distance I don't usually find myself in. I use the 4i for knockdown shots and short par 4s or it would be used about as often as the 5i.
I wish I had a range on my home course. I spend about 10 minutes on the practice green putting, then chip pitch for a few mintues...then on the first tee...I'll swing driver easy, then harder a few times...switch to 7i and then back to...
what were the complete circumstances of the incident? Was you car in your driveway which is adjacent to the course? were you passing the course on the highway and struck? I often wonder what the course of action is if you're driving...
This shot is the new frontier for myself. Not so much a knockdown...but a lower trajectory punch style shot. For the most part, I seem to be getting about 80-85% of what my normal full swing distance is. It's come in very handy on...
I practice pretty quickly....but I'll always step away from the shot after hitting, re-establish my grip on the club as well as my stance so I'm practicing that as well. I try not to hit the same club more than 3-4 times in a row.
The new GolfDigest has a feature on a similar strategy, where the ball and the left heel keep the same relationship...but depending on the club, the right foot separation varies.