So called "bracketing" is very useful technique in practice. A lot of scopes don't have fancy zero reset turrets. It is nothing more than reticle assisted hold-over. It is reticle and, most of the time, magnification dependent thought.
My old Redfield wide-view has duplex reticle. At 9x magnification, post-to-post extends 8 MOA. I zero at 200yd. Up post is about 325 yd. Low post is about 75 yd.
BTW, I like 200 yd zero. It will hit poa +/- 3" 0 to 250 yd without any turret adjustment. It is my "battle sight".
-TL
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