Posted: 7/27/2015 12:42:30 AM EDT
| At what distance any closer than 100m can I get a 100m zero on my irons? Thanks |
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100m is about the top of the trajectory, so it doesn't cross zero at any other distances.
You can do an offset zero at closer distances, which can give you an approximate 100m zero. (impacting 0.7" low at 50y for example) Its never as good as shooting a longer range zero though. |
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100 meters isn't very far. Your best zero will be the one you get when fired at that distance.
Short range zeroes exist to get you on paper at the longer ranges. I always establish final zeroes at the full distance range. Every high power rifle I own is zeroed at 200 yards on the NRA SR target. That makes iron sight zeroes 6" high of the front sight post at 200, scopes are dead on. Iron sights are dead on at 300 +/-. |
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Quoted: 100 meters isn't very far. Your best zero will be the one you get when fired at that distance. Short range zeroes exist to get you on paper at the longer ranges. I always establish final zeroes at the full distance range. Every high power rifle I own is zeroed at 200 yards on the NRA SR target. That makes iron sight zeroes 6" high of the front sight post at 200, scopes are dead on. Iron sights are dead on at 300 +/-. Mind breaking down the reason for two sperate zeros? |
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Quoted:
Mind breaking down the reason for two sperate zeros? Quoted:
Quoted:
100 meters isn't very far. Your best zero will be the one you get when fired at that distance. Short range zeroes exist to get you on paper at the longer ranges. I always establish final zeroes at the full distance range. Every high power rifle I own is zeroed at 200 yards on the NRA SR target. That makes iron sight zeroes 6" high of the front sight post at 200, scopes are dead on. Iron sights are dead on at 300 +/-. Mind breaking down the reason for two sperate zeros? I zero my scopes and irons at 200 yards. I use the NRA high power SR target when doing so. Scopes have crosshairs which I place at the center of the bullseye. This gives me an exact 200 yard zero on the scope. I use a 6 o'clock hold when shooting iron sights. I balance the bullseye on the front post like a pumpkin on a fence post. The nearly 12" diameter bullseye at 200 yards makes for a trajectory that is 6" high to hit a center X-ring. I use the 6 o'clock hold because I can hold it more consistently and that's the hold I've used since the beginning of my high power rifle career. Over 30 years and close to 200 tournaments later I'm not about to change. The truth is my eyes can't split a bullseye in half anymore, I have to use a 6 o'clock hold. There is an advantage to this in the field, you can actually see what you are aiming at rather than covering it up with the front sight post. My come ups are ten 1/4 moa clicks to get to 300 hundred yards, or five 1/2 moa clicks to do the same. This holds true for the irons or the scope when shooting .223. My come ups for .308 are fourteen 1/4 moa or seven 1/2 moa clicks for irons and the scope, in other words 3.5 moa at 300 yards. Because I place the target above the front sight post I can see it more clearly when shooting irons. The NRA 300 yards target is 18" in diameter. My 300 yard zero is actually 9" higher than my front post, however if I leave the 200 yards zero alone the 300 yard iron sight impact will be dead on with .223, 3" low with .308. A 200 yards iron sight zero based on the NRA 200 yard high power SR target is a great all around setting for .223 or .308 because you can pretty much point and shoot from up close to 300+ yards with the confidence you'll never be more than 2.5" (.223) to 3.5" (.308) above or below your trajectory. |