Wolf
As you will soon learn, there is an entire industry built around the 6PPC. With it, you have available the best in all components. You also have a proven winner.
The vast majority of the leg work has already been done. Shooters spend countless hours at the range, figuring out every concievable combination to make it just a little better.
I am going to give you some advice that we hand out quite often. Go to a Match. You can spend hours reading every post we have ever made, and still not have a grasp of what is really going on when it comes to Benchrest, (yes, with a Capitol "B"). Just one day at a real Benchrest Match will do more to open your eyes than ours of reading this Forum, or any other.
I use a tuner, but do as Charles said. Do a search. There is very little that has not already been said. If you are still confused, then come back and ask away.........jackie