I wrote this a long time ago. That old version is less than perfect and I've asked 6mmbr.com to remove it as they've also posted newer versions. But the internet is sometimes unforgiving on getting rid of stuff.
If I had a way to post my latest here I would. If you'd like a copy email for it:
I did a huge amount of research to form this and Bart is accurate in his assessment of it.
It does pass many many tests, as I have verified over the years.
The powder heat potential and pressure comes from QuickLoad.
Latest version calculates a line in the sand for shot rate, and I've dropped moly adjustment as nobody uses moly anymore.
Barrel life here is 'accurate barrel life'. That is a point where best accuracy, if reached, begins to drop(rapidly). Since most folks never actually achieve best accuracy from a barrel, most folks are late to see it's potential go bye-bye. That is, if the best you expect is 1moa from a 6.5x284, well then you may get 1moa FOREVER. If you reach 1/4moa with one, accept that you'll kiss that goodbye at ~1200rnds.
In contrast, BR shooters see it like a light switch was flipped.
If you group shoot quickly, your barrel's potential leaves quicker. If you shoot higher pressures, more powder, hotter powder, most overbore cartridges, barrel life is reduced. There is a price for everything.
One area that is not accounted for, as the data doesn't yet exist, is barrel life after Melonite treatment. This seems the best extension of life I've ever read about, potentially doubling even BR shooting barrel life.