I think you'd have to be super UBER special to turn a 26 Nosler into a 6.5 Creed in less than 500 rounds, and be proud of the end results.
Travis
I don't think that will happen to any cartridge that happens to have its best accuracy a grain of 2 short of book max. In fact with the .300 WM ladder I posted, book max was around 74 grains showing a velocity at 2700 or less. I hit pressure at 72.5 grains with a velocity of 2825 and good accuracy just a bit lower. Wind drift difference between the two velocities is 2" at 600 yards.
Check that. It's possible to turn a 26 Nosler into a Creedmoor with Blue Dot!
LOL!