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Old 05-26-2012, 09:08 PM
rraisley rraisley is offline
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Location: Columbia, SC
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Quote:
Originally Posted by ~tc~ View Post
I'm sighted in zero at 25 yards, about 1" low at 35 feet with Federal 40 grain RN Gameshok.

So, I assume the 25 yds is the "first" zero - where would the next zero be? 100 yds?
According to my spreadsheet, and assuming you get the published 1240/1103/1010 fps at 0/50/100 yards, and assuming iron sights at about 2.62" above the bore (which is what my 15-22 MOE is), if you sight in at 25 yards, you will be 2.3" low at 100 yards, and at 79 yards you'll also be at zero.

The only thing changing those values is the bullet velocity profile and the height of your sight above center of bore. My scope is 2.8" above, which would result in 1.8" low at 100 yards, with the second zero at 84 yards. Mounting your scope at 3.4" above center would actually result in zeros at both 25 and 100 yards, but that's getting higher than you might want.
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