How to Zero a Scope: This particular scope uses target turrets that move the point of impact 1/4″ (1/4 MOA) at 100 yards. You pick the range. A veteran rifle hunter, with just a few decades of experience under his belt, shares his method for getting a scope on target without wasting time or ammo. That’s most commonly ¼-minute of angle. He is a nationally-recognized expert on rifles, optics and western hunting. Such a rail has “gain” and puts the scope at an angle to the bore, so that, when you center the dial in its range, the scope’s axis (line of sight) crosses the bullet’s path farther away. If you're lucky you might get the rifle "pretty close" in three or four shots. The most useful zero depends on the bullet’s trajectory and on how far you intend to shoot. You’re better off zeroing hunting rifles so you won’t ever have to hold low. If you foresee likely shooting farther than 150 yards, or even 300 yards, then the best all-around zero for most rifles is 200 yards. If you could dial in enough lift to achieve a 600-yard zero with your .30-06, you’d still have to aim 17 feet high to hit a 1,000-yard bull’s-eye! From that data, I can establish a probably zero point at twenty-five yards that will get me close to the actual zero point that I want at one-hundred yards. What if you zero your gun at 250 yard? 308 Ballistics Chart & Coefficient GunData.org (Mind the dial arrows! When you can’t turn the dial past zero, you also avoid the possibility of “full rotation” error, which can cause spectacular misses. But barrel harmonics, etc, doesn't guarantee the gun will shoot where the hole is looking. Learn how to sight your rifle in at a near point blank range. Adjust the scope so the rifle shoots three inches high at l00, and you’ll reach 300 yards with a mere one inch of drop! Go for the 200 yard zero. Based on Your Zero at that yardage, you can calculate the rise and drop performance of your bullet. With the gun zeroed to impact a 200-yard target dead center, the same .30-06 will be 1.72 inches high at 100 yards and 7.66 inches low at 300 yards. The Conclusion: A 25-yard zero will put your bullet around 2.5 to 3 inches high at 100 yards depending on caliber, but it's not "dead on." 25 yard zero=2.9 inches high at 100 yards. Add to all of this any cross winds and unless you really know what you are doing, you may as well be throwing rocks. Needing to check zero it would have been easier to check things at 100 yards. I zero my center fire rifle scopes to hit dead on at 200 yards as most Alaskan game is shot under that range and I don't worry about hold over from the muzzle to a little over 200 yards. At 400 yards it will be 1 inch (4 x ¼). A three-inch vertical error still gives you a killing strike in the ribs of big-game animals. The Rise and Drop are expressed in INCHES. It will then double at 200 yards to ½ inch (2x ¼). The most common short-range zero is 100 yards, and the most common long-range zero is 200 yards, which is an indication that the peak performance window for most hunting bullets comes at velocities from 100 to 200 yards from the muzzle. 308 Ballistics And A Typical Hunting Load. You also only know that the gun is zeroed to 300 yards. I've hunted in Idaho since 1973, and with the varied terrain and distances I could shoot--30 feet to almost 400 yards, I sight in my rifles to be 1.75 to 2 inches high at 100 yards,then they are dead on at 200 and a 300 yard shot is just a small adjustment in drop,400 needs more adjustment but isn't hard. So what happens if you set your zero to 1” high at 100 yards. Get the 74th edition of the World's Greatest Gun Book. No matter which I shoot I always know where it's going to hit no matter if I'm hunting or killing paper. Yards based on 100 yard Increments to hit no matter which I shoot I know... 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