Using the 100 yard zero column: 1" high at 100 is 2.5" low at 200, not 2" high at 200
Sorry brother but you are also incorrect about "accounting for half" from 100 to 200. Every caliber has different ballistics and you have to go by the specific chart that is created for the applicable caliber and each particular load. In this particular case, his 7mm-08 shooting a 140gr ballistic tip using the load specified, according to the 100 yard zero chart, the bullet drops 3.5" from 100 to 200. He can:
- sight in 3.5" high at 100 and be zero at 200
- sight in at 2.5" high at 100 and be 1" low at 200
- sight 1.5" high at 100 and be 2" low at 200
- sight in 1/2" high at 100 and be 3" low at 200, etc.....
The chart in the OP's initial post is wrong. I can't answer which, if either, of the 100 or 200 yard zero columns is correct but the math has to jive between the two columns, and it doesn't.
I didn’t realize there had been so many new responses to this post, but FWIW the chart was a screenshot taken from their ballistics chart app on my phone.
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