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My '06 has a 26" barrel. I'm getting right around 3,000 ft/sec at the muzzle with 150-grain bullets.
What I've found from the 100-yard bench and the 500-yard table is that if I zero at 200 yards, I'm about two inches high at 100. I'm estimating around six inches low at 300 and just under two feet low at 400, from the Sierra book's tables. I'm four feet low at 500, by test.
What I've also found by test at 500 yards is that there isn't enough difference to matter for boat-tailed bullets of 150, 165 and 180 grains at these scope settings and shooting distances. The group centers well be within a couple of inches of one another.
Art
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