All projectiles that are influenced by gravity follow an arc, or ballistic path. That path is a factor of projectile speed, weight, initial angle and a few other factors that make up BC.
Scopes “look” in straight lines, so the point of sighting in is to cross the scope straight line with the pellet loop.
Many centerfire long range shooters choose the top of the projectile loop to zero, others choose a distance before the top of the arc, this gives you a far and near crossing point or Zero.
To do it either way you need to know a few things about the projectile and the scope to bore distance. Also there is no “Right Way”
I am by no means an expert, but I have used both, if you are willing to do the homework around measuring speed weight bc angle and bore to scope distance then the single zero at the top of the projectile arc is generally more accurate.
I generally click to my target, sometimes I hold. The single zero results in that hold always being over or clicking the reticule down.
Strelok is your friend, if you feed it the correct data it will tell you what distance the top of your arc is, or based on chosen kill zone size, what distance for a near and far zero distance.
Strelok is a little bit of work initially , but the repeatability you can achieve afterwards is worth it wheather you hunt or target shoot.