My rounds are loaded to 2.85 with a 130grain JLK so they fit in an AI mag. This length is not even close to the lands on my rifle. My rifle was originally built as a single shot and throated for the 140berger. So my bullets are making a loooooooong jump. My 260 by MCR
Like you said though, all this is meaningless to your situation. Although a COAL of 2.86 on-the-lands sounds seems a little short, what you need to do is get yourself a Hornady OAL guage:
Hornady Lock-N-Load Overall Length Gage Bolt Action
With it, you will be able to determine almost exactly the OAL for that particular bullet when it touches the lands.
Then my recommendation would be to set back .010. So if you are 2.86 on-the-lands, you would load them to 2.76. .001 is not sufficient set back because you would have a hard time loading them that precisely. This would mean that some of your round would be on the lands and some off the lands. And that would cause you lots of fits.