Is the bullet unstable at 100 yards, then gets stable at 1000?There are a lot of long range bullets that take a little while to settle down. For example back in my old camp perry days, shootin 308 Winchester I had 175 grn match kings over Varget. My particular load would shoot approximately one or even one and a quarter MOA at 100 yards. But that very same load would be 1/2 MOA at 1000 yards. For targets that were under 400 yards I would run 155 Scenars and switch to the 175 farther out.
I pretty much have the same thing going with my 300 WinMag. I am only about 12 rounds into my new 300 PRC so we will see how that goes.