Re: casting weighted flies
I agree with using a heavier line and rod.
I always prefer to use sinking lines instead of weighted flies. Weighted flies can break the tip of your rod.
That said, when making longer casts with weighted flies I actually do not wait for my loop to unroll. If I do, I find the weighted fly will bounce at the end of the false cast and add slack to the line. Even if it doesn't bounce, the line will drop and you may end up hooking yourself on your next cast.
Keep in mind, however, that when I make longer casts with weighted flies I actually used more acceleration on my casting stroke.
But the wind can kill any cast, so I always wear a broad-brimmed hat and sunglasses.