Rick,
You completely missed my point:
The reason 6.5 bullets have an advantage over .270 bullets is the way both evolved. With the multitude of good 6.5 (and 7mm) target bullets that have been out there for decades, plus more recent models, there's been zero reason to develop either .270 bullets or cartridges for long-range target shooting.
If you don't believe me, please provide ONE examples of somebody who developed an entire line of heavy .270 target bullets, plus new cartridges to fire them in fast-twist rifles. You can't, because it's far easier (and more practical) to use what's already been available for a long, long time.
Like Dennis, you're assuming the availability of 6.5mm and 7mm target bullets means there's some sort of magic in 6.5mm and 7mm, and the few hundredths of an inch of bullet diameter between 6.5mm and 7mm is somehow bereft of that magic. That assumption defies logic and the laws of physics.
