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Long Range Hunting & Shooting
What is your baseline zero a dial adjustable scope?
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<blockquote data-quote="jfolanddvm" data-source="post: 2855701" data-attributes="member: 70626"><p>Coming late to the party, as we just got back from Africa and I'm just catching up on emails. So, in answer to your question, no matter what distance you zero at, your bullet will never be lower than your scope height at close range. When using a 200 yard zero in a 30 caliber rifle shooting a 200 grain bullet with decent BC at 3000 fps, the bullet first crosses the line of sight at between 30-40 yards and then crosses again at 200 yards. Its highest point in the arc will be somewhere around 150-175 yards, but should not ever be more than 2" high. So anywhere between 5 yards and 240 yards, the bullet should never hit more than 2 inches from point of aim. When zeroing at 100 yards you're just lowering the top of the parabolic curve of the bullet's flight path to closer to the line of sight, so the first time it crosses line of sight will be more like 70 yards and then it crosses again at 100.</p><p></p><p>When I first started playing with rifles, everything I knew was gleaned from Jack O'Connor or Jim Carmichael in Outdoor Life. Their advice was to zero at 25 yards, which would put you about 1.5 inches high at 100 yds and back on zero about 225 yds. When I first started playing with the long range stuff, I tried setting zero at 100 yards, but after 40 yrs of the old way, my inelastic brain wasn't re-setting it's zero...</p><p></p><p>So, short answer, I zero at 225-240, hold to 300 and dial most shots over 300 if the animal allows. This did cause me to miss an opportunity on a pretty good waterbuck last week, as we spotted him, ranged him at 365, and as I was dialing, he started walking and then trotting off. The old me would have held a little daylight and squeezed it off, but the new, more precise me watched him trot away as I dialed<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="jfolanddvm, post: 2855701, member: 70626"] Coming late to the party, as we just got back from Africa and I'm just catching up on emails. So, in answer to your question, no matter what distance you zero at, your bullet will never be lower than your scope height at close range. When using a 200 yard zero in a 30 caliber rifle shooting a 200 grain bullet with decent BC at 3000 fps, the bullet first crosses the line of sight at between 30-40 yards and then crosses again at 200 yards. Its highest point in the arc will be somewhere around 150-175 yards, but should not ever be more than 2" high. So anywhere between 5 yards and 240 yards, the bullet should never hit more than 2 inches from point of aim. When zeroing at 100 yards you're just lowering the top of the parabolic curve of the bullet's flight path to closer to the line of sight, so the first time it crosses line of sight will be more like 70 yards and then it crosses again at 100. When I first started playing with rifles, everything I knew was gleaned from Jack O'Connor or Jim Carmichael in Outdoor Life. Their advice was to zero at 25 yards, which would put you about 1.5 inches high at 100 yds and back on zero about 225 yds. When I first started playing with the long range stuff, I tried setting zero at 100 yards, but after 40 yrs of the old way, my inelastic brain wasn't re-setting it's zero... So, short answer, I zero at 225-240, hold to 300 and dial most shots over 300 if the animal allows. This did cause me to miss an opportunity on a pretty good waterbuck last week, as we spotted him, ranged him at 365, and as I was dialing, he started walking and then trotting off. The old me would have held a little daylight and squeezed it off, but the new, more precise me watched him trot away as I dialed:) [/QUOTE]
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What is your baseline zero a dial adjustable scope?
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