One more question for my 6.5 Creedmoor vs .260 Remington research binge
Once you whittle down the differences between them, the 6.5 Creedmoor seems to just edge out the .260 on maximum accuracy if that's what you're chasing. There will be some differences in this though, longer projectile or whatever in the 6.5 to give it that edge.
What if you're using the same projectile in both though. Exact same projectile, same velocity, once it leaves the barrel everything behind it no longer matters, so accuracy should be basically identical?