This is a great thread, all of the advice has value.
No matter to what extent you fine tune your rifle's setup and prepare your pellets you still have to know it inside out to be able to predict where the pellet will land in a multitude of different situations and conditions. This is were the advice of getting lots of range time, practice and course experience comes in. I also agree that your rifle has to be able to group reasonably well in the first place, and straight out of the box most do. Any help you can get in the trajectory, accuracy (grouping) and wind resistance can reduce the margin for error which will give you an advantage.
I will continue to work in this area as when the deviation for windage or trajectory is reduced to less than the KZ size the likely hood of getting the pellet in there is increased.
HFT, for people with only 2 buttucks!
VooDoo TwoTwo The next chapter.