I think this guy (Wade Rush) has some borderline dangerous reloading practices, and very much a trial and error method, so I feel like I should say that up front. I like trial, but the price for ERROR, is too high for me with reloading. You're an adult and can take your own risks, but I do want to be careful not to endorse dangerous information and trip up someone who is learning.
That aside, he's helpful and puts a lot of his unscientific testing out there. It gives you a feel for what works and what doesn't but not so much that you could count on repeatable results. He does show as much