A lot of FT shooters use variable zoom high power mag scopes.
What I don't really understand is do they "calibrate the scope at various distances " in ONE power or several powers?
Let's say you have a can at 30m. You've got your nice air rifle, your nice var. zoom scope and no idea how many clicks of elevation you need to hit the damn thing. (we assume no wind).
Now, let's say you want to calibrate your scope. So you take the can put it at 10m. Focus the objective perfectly, and mark that point in the objective as 10m (somehow, I don't know how you would mark a scope). You shoot, adjust, shoot and adjust the clicks on the scope until you get it right.
Step 2. Put the can at 20m. Adjust the new focus on the objective, mark that point as 20m on the scope. Shoot, adjust, shoot and adjust again. And you notice that to shoot at 20m you have to change the elevation on the scope by 6 clicks (just made that up). Then you do the same for 40 and 50m.
So let's say you are back at the original situation. Can at 30m, same rifle, but now your have markings on your scope and a "range card" or whatever with the MOA clicks.
You focus the image of the can and look at the scope reading you marked earlier and say "Oh, 30m, that's cool" and look at your card and see that it's 15 clicks up from your 10m zero. So you adjust 15 clicks up, aim, keep it steady and all that stuff, and bam...right on target.
Is that how you would do it?
Plus, what does zeroing a rifle mean? Let's say you zero it at 30m, that means that if you shoot something at 30m, the center of the cross hairs will get that target. if you shoot something at 50m, it will fall short, right?
But is the MOA setting on a zeroed scope like 0 MOA ?and then 50m is +20 clicks and 10m is -20 clicks or something?
Someone clear this whole thing up for me? I'm confused.