I have time to figure this out since my new barrel is at least a few weeks out at the moment. But I also haven't ordered my headspace gauges yet so I can't answer the first question by just measuring.... I'm curious what the difference in length between the go and no go gauge is (if it varies, I'm going interested in 6.5 PRC) and what the tolerance range for "correct" headspace is? Also curious where in the range (ie, min, max, or somewhere in between) the go gauge would likely set headspace (I'm sure personal techniques affect this so maybe it's a dumb question)? For that matter from a practical standpoint, if I'm chasing n'ths is there any advantage to nit picking the headspace down to the last thousandth, or is good enough just fine?

Thanks everyone!