In regards to reduced windage at near end points of elevation - its because the tube is a circle. And if you move the adjustment (scope internals) to the top (or bottom) of the circle then there is less side to side room, as opposed to if the elevation was centered where you would have maximum windage adjustment available. You would also have less elevation if windage was way off to one side due to the same reason.
Steiner tests their scopes to 1000cycles at 1000g's. Yes 1 thousand G's. Confidence in your rig holding a zero and being on target when you need it is a very important factor, imo.
When it comes down to it you can go put "2-16 power scope" into ebay and find lots of options from sellers in China in the $250 - $500 range. Lots of air soft stuff. Im sure most would have pretty good clarity, feel solid enough and track ok on a bench. Personally I would not consider the ebay scope, and instead go with something with a rock solid reputation for holding zero but has less magnification range.
Holding an aluminium tube in your hand, clamping it to a bench in some rings, spinning the adjustments, and deciding its a clear scope with semi-mushy click feel etc can not give any real world insight into how it will handle actually being used as a scope. You can get telescopes with lots of magnification pretty cheap, and untill proven this can actually handle being a scope, on a gun, getting used - then its a telescope with a faux reticle.
If it has the magnification, elevation range and clarity you say it does. All you need to do is prove it reliable as actually being a scope and not a telescope with a reticle.
As long as its unproven, and it needs to be purchased from China (which is an issue because unproven and no one/very difficult to return it/get help) then it will struggle here.
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