I've been playing disc for over ten years. I think I am getting good speed and snap for the most part. It seems to fly out of my hand fast and in the right direction but it just DIES at 350. I use the power grip, I have large hands and measure in at 6'8. Any suggestions??

I love/hate/obsess this game

I can sympathize. I highly recommend Blake T's site. A link is in his signature. Look to the articles found at the instruction and technique repair links. Although I couldn't identify any one article on drills for keeping the nose down, I bet he does have drills. Based on a quick recall, some of the possible culprits are:

orientation of disc in hand - see his article on this

the position of the wrist relative to the plane of the forearm - he has some very useful photos

weight being over the plant foot rather than behind - he discusses it somewhere

I also suspect that the swing itself is important. I have a lousy swing where the disc is released far in front of me. I suspect that in order to achieve this lousy swing, I create a dip in the last half of the swing which results in a nose up throw.

As a sidenote. I always assume I have a problem with nose-up, but it could simply be a lack of power and I would love to hear useful observations on distinguishing between a nose-up throw and a throw that simply lacks power. In my mind, signs of a nose-up throw are little-to-no mid-flight flip and what I would call a continuous, identifiable stall the last third of the flight or so.

I echo James' advice. Blake's website is Discgolfreview.com (http://www.discgolfreview.com) and is chocked full of good info.

When I throw a sloppy high shot I usually can think and narrow it down to being behind my plant foot on release. The info on wrist position is good. Also disc orientation in your grip and maybe try moving your thumb forward a bit and increasing it's pressure into the disc.

there's about 1000 things you can do to get the nose up... and another 1000 ways to fix those 1000 things... but only a handful of the fixes are really good ways to fix it, and most of them lie in the base fundamentals.

most common factors leading to nose up (several of which have already been named):
-grip/orientation
-balance/weight shift
-pull line (close to body, dipping, etc.)
-finish (or lackthereof)

without knowing your throwing motion i can't really say any particular drills other than throwing practice involving "good" execution of above said factors :P

change your grip to fan or stacked
mj