NRA highpower targets are designed so that the ten ring and X ring of conventional (sling shooting) targets are almost exactly 2 and 1 MOA regardless of the distance. F class targets are similarly designed so that the ten and x rings are 1 and 1/2 MOA regardless of the distance
For that reason, micrometer sights and telescopic sights used for NRA highpower (including F class and Palma) all adjust in 1/4 or 1/8 MOA increments. Because of that shooters in those disciplines all adjust sights and call wind in MOA
So for example if a shot lands on the edge (or just outside) an F class target ten ring you know immediately (without even measuring with the reticle) that you need to adjust 1/2 MOA into the wind to get an x ring hit. You can then either dial or hold off that much and fire again.
You can shoot F class with a milliradian scope if that's what you have, but an MOA-adjustment scope with an MOA reticle will make life easier.
Does that help? Let me know if you have any other questions.