I shot service rifle with M1, MK2-1, M14 and M16. My Creedmoor, Champion Choice or Champion Shooter Supply Data books from the late 80s and early to mid-90s have the grids on targets. Early on, I used to screw myself all up taking the marked shot/group location, calculating distance to center-X then recalculate to 1/2moa clicks. What a retarded waste of time that was! That kind of over-thinking a problem kept me in EX class too long. Once a certain SGM smacked me on the back of my head and told me to stop doing math and do what the paper was already telling me, I would be much less rushed and relax more on the line. Made MA shortly after that light got turned on and Legged out.
Same applies to going to mils. I thought I would MOA all my scopes because that was what I was used to and knew M852/FGMM and MK262 come-ups from 200-1000 COLD. Thought I would keep my zero at 200 also. I was wrong. Only folks using MOA in significant numbers are F-class and LEO. MIL/MRAD has become much more common and really, the math doesn't belong in any practical application except reticle ranging, which is pretty impractical anymore with LRFs being so prevalent and affordable. Your ballistic apps all have selection to show MOA or MIL adjustments. Same apps will also give you a visual reticle with holdovers at each stadia line. Your dope card should show elevation settings in whatever that scope's turret adjustments are. Your windage should be the same as your preferred method, hold or dial. (Yes, there are still MIL/MOA scopes out there). As most of the truly experienced folks have said before, if your reticle matches your knobs, just measure and dial. It's as simple as that. You don't have to worry about using a spotting scope with no reticle and guessing location, your rifle scope will tell you all you need to know, as long as barrel or suppressor mirage doesn't screw you over.
My first exposure to practical optics was a Leupold M1A Ultra 10x on a Navy M14 DMR. MILDOT reticle and 1/4moa dials with no zero stop. We didn't have LRFs, so I learned the H(Tgt in yds)*1000/MILs = R(in yds). Use a NM wind rose taped to the side of the stock to dial windage. Was taught to zero at 300yds then used holdover/unders for 100, 200, 400, 500, 600 and 700. Windage was 5/10/15/20mph across the horizontal mils at 700 and you could just cut it in half for 400, between 400 and 700 was use the wind rose, 200-400 was use 1/2, inside 200 was shoot dead on. Pretty simple once you get used to it. We really expected any actual use to be inside of 200yds and at angles, so trained more in that direction, but still kept going further in our skill set. You can still apply similarly with the EBR-7 family (I have 3 AMGs with the original EBR-7), but you're 6.5cm, not 308, so the values change quite a bit.