Ysterhout Dot Net
These sources gave me the information I needed to reach the point where I am now, in terms of information presented that I physically used for observable improvement.
I recommend you research for yourself everything these people have to say on the subject of load development, reloading and precision shooting.
Additionally search YouTube for all Dan Newberry's instructional videos : OCW Done Right
The most valuable load development technique you can learn :
.2 MOA All Day