McLeish - 8" to 12" of drop is easily accounted for in this day of laser rangefinders- everyone has at least one - kinda like chronoraphs any more - everyone has one, don't they?

As to the accuracy, the banded bullets surely do provide. In my rifles, the newer TSX are amazingly accurate, especially in 3 shot groups. The .375/06IMP routinely provides cloverleafs with the 270gr. TSX from 2,550fps to 2,720fps.

Guys around here with .35 Whelens use 250gr. Speers mostly - for moose and experience end to end penetration at 2,450fps MV. Of course, the moose absolutely refuse to take another step after being stern or bow shot with one. They also have a pretty good BC. .446 for the Spitzer and .335 for the Grand Slam, a more deeply penetrating bullet yet.

I'm a bit surprised they don't know the BC for the Hydro - all it takes is 2 chronographs and a 100 yard range. Perhaps it's so low, they don't want to advertise it?