Because the guys on this forum tend to be a little more "involved" than your average hunter.
And I will even say this.... I bet that a lot who profess to do this in writing don't actually do it real-world, but like to be part of the "informed" crowd.
Myself, I tend to find one good load, with an adequate bullet, and roll with it.
If I find that I need another 10 or 20 or 30 grains of weight, or my hunting is that varied that something like that would matter, I will most likely be grabbing a different rifle.
