Exactly! Natural point of aim.you would be correct, on priming, some leave primers on the mat to prim when down on mat. good trick for body alignment is when you get on target close aiming eye and open if you are still on target , if so body alignment is good. If not move your body until you are on target, not the rifle to target.
If Hoppy does it like we do, each shooter will get a "pit schedule". On our 3 man squad system, each man in the squad will randomly draw a number between 1 and 3. The number you draw will be your number for the weekend. Our pit schedule has 3 columns......shoot, spot and pits. If you follow your number on the pit schedule, it will indicate when you shoot, spot and go to the pits. Hop or your squad mates will explain the system to you. Don't be shy about asking what you do next. You'll get the hang of it pretty quick.
Never bring your rifle to the firing line until you hear the command to do so. This will happen when the "pits are sealed", and all the target pullers are in the pits and accounted for. However, you can get the rest of your stuff set up on the firing line. K.I.S.S. shooting mat, primers, X-sticks, [rubber mallet] and timer if you would rather have it there than on your reloading table. When there is a pit change, all rifles must be removed from the firing line.
When your relay is called to the firing line, bring your rifle, and make the final adjustments to your sticks to get your N.P.O.A.. When you hear the "fire" command, start your countdown timer, add primer and shoot an "X" on your first shot. [Why not? the bullet has to go somewhere, right?]
When your done firing at 800 yds, remove your stuff from the line, write down your sight setting and put in the sight setting for 900 yds. [Don't forget!] put stuff away and get ready to spot or head to the pits. X
P.S. Tomorrow or Monday, with 45-70's input, We can give you some pointers on what is expected from a [good] spotter.