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Long Range Hunting & Shooting
Sighting Zero at what distance ???
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<blockquote data-quote="digisol" data-source="post: 376233" data-attributes="member: 24013"><p>Seems the thread has got a long way off target somewhat, about as much as some shooters accuracy does after firing off a few boxes of 300 WM cartridges in one session from the bench. </p><p> </p><p>For answering the OP's original question, whatever "zero" you choose is of no real consequence, a hunting shooter chooses a particular zero so they shoot 2.5" high at 100yds and 2.5" low at 400yds, making a proper one shot kill within that 5" vital kill zone a reality.</p><p> </p><p>For the OP, a reason in choosing lets say 200yds as his sighting in zero is only to test loads, cases, powder, primers, and most importantly high BC projectiles so that the accurate loads strike that zero for no other reason but checking load accuracy, but for a 300 mag cartridge it would be practical to use 150 or 200 yds, but only for load/scope testing.</p><p> </p><p>Whatever further range the rifle is then used for is simply a matter of first having an accurate combination at whatever zero, and then working out exact hold over for each different distance past that zero, for eg a 308 might drop nearly 50" or over 4 feet at 500 yards, while a 300WM at 500 yds might be dropping about 35-40".</p><p> </p><p>Whether you use 150 yds, 300 yds or 500 yds as your zero really means squat, so long as each shot shoots lands in that distance at MOA or better at any range, the shooting distance only extends those measurements more but in a perfect world with no wind and very high BC projectile the chosen bullet will still fall the exact same constant amount at 1000 yds whether it's zero was at 100 or 500, and the only difference with zero at 100 or 300 might be a different bullet drop at 1000 yds, or the difference in zero range, likely a few inches.</p><p> </p><p>So, to the OP, it simply does not matter, but in practical terms 200 yards would be a fair zero, for that particular rifle, although at the closer distance it eliminates more external effects of the projectile in flight, so for my liking I would zero it at 150 yards, no matter what the eventual distance it would be used at.....</p></blockquote><p></p>
[QUOTE="digisol, post: 376233, member: 24013"] Seems the thread has got a long way off target somewhat, about as much as some shooters accuracy does after firing off a few boxes of 300 WM cartridges in one session from the bench. For answering the OP's original question, whatever "zero" you choose is of no real consequence, a hunting shooter chooses a particular zero so they shoot 2.5" high at 100yds and 2.5" low at 400yds, making a proper one shot kill within that 5" vital kill zone a reality. For the OP, a reason in choosing lets say 200yds as his sighting in zero is only to test loads, cases, powder, primers, and most importantly high BC projectiles so that the accurate loads strike that zero for no other reason but checking load accuracy, but for a 300 mag cartridge it would be practical to use 150 or 200 yds, but only for load/scope testing. Whatever further range the rifle is then used for is simply a matter of first having an accurate combination at whatever zero, and then working out exact hold over for each different distance past that zero, for eg a 308 might drop nearly 50" or over 4 feet at 500 yards, while a 300WM at 500 yds might be dropping about 35-40". Whether you use 150 yds, 300 yds or 500 yds as your zero really means squat, so long as each shot shoots lands in that distance at MOA or better at any range, the shooting distance only extends those measurements more but in a perfect world with no wind and very high BC projectile the chosen bullet will still fall the exact same constant amount at 1000 yds whether it's zero was at 100 or 500, and the only difference with zero at 100 or 300 might be a different bullet drop at 1000 yds, or the difference in zero range, likely a few inches. So, to the OP, it simply does not matter, but in practical terms 200 yards would be a fair zero, for that particular rifle, although at the closer distance it eliminates more external effects of the projectile in flight, so for my liking I would zero it at 150 yards, no matter what the eventual distance it would be used at..... [/QUOTE]
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Sighting Zero at what distance ???
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