Another thing to consider is the scope adjustment itself. Most scopes are set up for 1/4 inch per click at 100 yards. Some varmint and target scopes are 1/8 of an inch per click at 100 yards (mine is). This means at 50 yards it is half that and at 25 it is half that again. Meaning that while sighting in your gun at 50 yards you will need to move it twice as many clicks as you would have at 100. And at 25 yards it would be twice that again. So for a 1/4" click scope you would need to move it 16 clicks to change your bullet impact 1 inch.

Lets say you shoot your gun at 25 yards and it is 2 inches high and 3 inches off to the left. You would need to dial in 32 clicks down and 48 clicks right. With a 1/8" MOA scope it would be twice that![] Taking into account bullet hole size and group size you could easily be off by 4 clicks and not even know it, maybe more in some cases. And that is providing your scope even has that much adjustment in it.

Now lets take this same scenario out to 200 yards. 1 click on your 1/4" MOA scope would equal a half an inch of impact shift. So if you were 2 or 3 inches high and left at 200 yards you would only need 4 or five clicks to compensate for it. Those four clicks you may have been off at 25 yards would correlate into 2 or 3 inches or more shift at 200 yards.

And this does not even take into account other factors like velocity differences, altitude differences, sight height and even shooting form.

As you can tell I am not a huge fan of close range zeroing of scopes. I mean it might get you close and would be ok for shooting large game at moderate distances if you were not overly concerned with precise bullet placement. However for any kind of accurate shooting like smaller animals, varmint hunting, more precise shots or target shooting I just don't see it working.

I like to sight in for windage at 50 yards, then check it and touch it up at 100 yards if it is a calm day. Then zero my gun for elevation at the actual distance I want it zeroed at, 100 or 200 yards. A good trick for this is to not shoot at a bullzeye, use a line on the target from left to right and and just concentrate on getting the bullets to strike or center on that line. Don't worry about the left and right movement. It makes things much easier because you are only concentrating on one axis.

My opinion anyway

Paul