Dip Stick,
Not that it really matters but the Hornady 143's on the bench must be close. The Noslers are only .658 but, like I said, it doesn't really matter. Any 136 to 144 grain 6.5 isn't going to suck too badly. If a .600 bullet shoots 1/2 moa and a .690 shoots 3/4, I'll use the .600 and deal with the wind. My dies produce a bullet much like the Hornady.
I'll confess to not competing as much as I used to; I have to drive too far. I still shoot a little though and have two ranges on my property.
I agree with you that bullets matter more than headstamps but just how they matter is the question. BC isn't always everything. You take care. GD