Tract scope to in full production

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Interesting and nice, but why the vertical line with incremental marks all the way above the horizontal line ? Try to learn something new. Anyone?
I have seen that on other scopes as well, far and few in between but they do exist and have often wondered what you're asking, thanks for bringing it up and hopefully someone can answer
 
The "stadia method" allows shooters to calculate the distance to target without the use of a rangefinder. Essentially, these reticles contain aiming marks of known spacing that are used to determine range, based on the visible size of the intended target, compared to the size of a target at a known distance.
 
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