I probably worded that badly. What I meant was that mac said "come up 10 clicks and take some sighters" and I assume he meant during the match itself. Because if he meant before or something (obviously not for score) I would not have the 55 30-06 needed for the match itself.
This is why cmp runs "backwards" in the course of fire.
CMP you start with prone position as to allow new shooters and those using CMP club guns to "zero"
You need a starting point 10-12 clicks up should get you on paper ....somewhere on the 40 plus inch target (5 ring is 37") I usually take 2 shots plot them on my score sheet(I will bring a few score/log sheets) and figure out any adjustment. You get 5 sighters...
NRA National Match service or match Rifle you get 2 sighters per yardage/position. Some allow unlimited sighters (with in allowed time limit) then you just declare shooting for score when ready.