My drives tend to drop between the 200 and 250 yd markers at the range, when hitting from the mats, so I guess 225yd carry. With thick grass and some upslope, the roll is limited.
I always wonder how accurate the markers are, and how much the range balls influence the distance. I figure 10% as a reasonable guess.
On the course, I have hit solid straight drives that went 290-300 with roll, but those are 1 in 10 at best. Sure feels good to hit one though, and I always remember them as feeling almost effortless. And it's really fun to have a 120yd 9-iron or 100yd PW straight into the green.
Working on letting my hands/arms "drop" from the top, rather than hitting hard from the top, has increased my distance, because the club reaches maximum speed closer to impact, rather than early on. Also seems to reduce the % of bad shots, due to less tension and "hit-it" instinct.
As for bad shots, hooks and slices that go 150-200yds, 20-40 yards left or right. OB on any kind of challenging course, particularly the links style we have in Colorado with either wetlands or high-dry grasses scattered everywhere.