I think I have a conclusion from all this.
I did do the boresight as people have suggested, and found that the laser pointed a bit higher than the boresight would suggest, so I was able to gain some elevation back and thus gain more rotation in the windage.
I think thats whats most confusing about all this, because this is the only scope (for me) where its been relevant that max elevation change depends on your windage adjustment and vice versa. So i have no actual idea if I'm nearing the end of elevation or windage because they're relative to each other. I haven't found myself in this situation with other scopes because I haven't needed to go to the extremes.
The scope has 50 MOA of adjustment total, and its 15 MOA per rotation Right now my windage is about 0.5 rotations from the end, so pretty heavily to one side.
I think overall this has been an issue of 2 problems, one is my mount is probably slightly pointing one direction, and two, I believe the scope itself isn't very well "centered" when its at the mechanical zero. I did put it on another rifle again and though it was better, the point of impact is still to the right of the point of aim. However, due to this difference, the binding effect at the extremes of adjustment didn't come into play on the other rifle.
Add that to the laser end point being slightly higher than boresight, starting out with a 20 MOA rail, and my confusion with the elevation/windage binding, resulted in my confusion overall.
Here's something I found on another form about the geometries involved. Note the last sentence. I think due to the above 2 reasons I found myself in such a situation. I had no idea that scopes worked that way. I thought you'd be able to "trace a square" along the maximum adjustment range with your reticle by using your elevation and windage turrets, but seems to be incorrect. A circle can move circularly inside another circle, but cannot trace a square larger than the circle.
Here is the scoop guys. The reason this happens is because a scopes erector tube is round and it sits in a round tube. This is perfectly normal and happens in just about every scope out there that a tactical long range shooter including pretty much all the scopes commonly discussed on this forum. The only way to stop this from happening is to severely impede the overall travel of the scope.
In the end it just comes down to basic geometry. A circle(erector tube with size being around .800") in-cased in a larger circle(scope tube with I.D. about 1.000") can move freely inside that circle. In order for the smaller circle(erector tube) to move the shape of a square it would need to be restricted. Which this is possible to do ,but in the process you would give up a large amount of real estate in the larger circle(scope tube) and end up not having the amount of elevation that we shooters demand. Just picture a square(proportional to smaller circle) inside the larger circle(scope tube) and you will see just how much you will give up.
As I stated earlier this is very common and the reason that it generally is never brought up is- very seldom do we find our selves dialing even remotely close to the amount of windage travel that is available in most scopes.
So when I first initially tried to sight this, due to the above reasons, I pretty much went straight to the grey colored region and found my elevation limited. Where as usually I'd be making adjustments in the green box, where you can move freely.
Thank you potashminer for pointing this out, I would've never thought to look into this otherwise.
I do not know how modern scopes are made, but think like the scope body is a larger diameter tube and the reticle is in a smaller diameter tube, inside the big one. A gimble or similar at the front of small diameter tube and the turrets and bias spring acting near the rear end of the small tube. When at mechanical dead centre with small tube - is much left to right or up and down adjustment available. Now force the small tube against top or bottom of the big diameter tube - or against left or right - by "maxing out" turret adjustments - can not move at right angles, or can not move very far, because the two tubes are hitting (or close to hitting) to each other.
