Let me tell you, at some point in your journey to the "gold" you will consider weighing and sizing your pellets. Personally the jury is still deliberating on whether this is beneficial or not.
At one point I saw everyone else doing it and started the process. Purchased a scale to weight the pellets and then a pellet sizing tool. I start weighing and sizing my pellets and after a couple of hours I make my way through the first tin. That's right, it's a SLOW process. So after that I figure I'll test the pellets and verify that they do, in fact, shoot differently as I should see POI changes. I start shooting the first group of pellets, then the second and so on. In the end I can't say that I noticed a single difference in POI change or anything else. And for the couple of hours that I just wasted I'd probably do better to spend that time practicing.
Personally, I see a good number of people weighing and sizing their pellets but I don't see them at the top of the leader board like I would expect. Especially for all the time that they must be spending weighing and sizing those damn things!
My suggestion would be to spend that time practicing.