My scope's have been rock solid as far as holding zero so far. Taking 7mm rm and .270 from 400 ft to 9k ft. In less dense air and a slightly reduced acceleration of gravity you would expect them to shoot high. Both are zeroed at 200. Ballistics calculation on the 7mm rm show that you could expect a little less than 1/4 moa or 1/10 mil rise at 200 yards. I am thinking just compute dope for 9k and be done.
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Re-zero or just new dope
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