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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
How to tell how much MOA adjustment is left in my scope?
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<blockquote data-quote="royinidaho" data-source="post: 263802" data-attributes="member: 2011"><p>Let's see:</p><p></p><p>I come up with 62 clicks with a .25 moa per click at 100 yrds scope so thats 15.5 moa of up adjustment. Right?</p><p></p><p>62*.25 = 15.5 so that's a good calc.</p><p></p><p>From Hornady's Ballistic Calculator: Why they don't go beyond 500 yds I don't know.</p><p></p><p>Ballistics Calculation</p><p> Input Variables Firearm typeRifle Sight Height1.5 Bullet Weight <em>(grains)</em>40 Ballistic Coefficient.275 Muzzle Velocity <em>(fps)</em>3600 Temperature60 Barometric Pressure <em>(hg)</em>29.53 Relative Humidity78% Zero Range <em>(yards)</em>100 Wind Speed <em>(mph)</em>0 </p><p></p><p>JBM says 62 Clicks w/100 yd zero and 1.5 line of sight about line of bore will get you on at 725 yds.</p><p></p><p>Sounds like you're spot on.</p><p></p><p>Do an accurate determination of line of sight above line of bore. </p><p>Then shoot for zero at different distances.</p><p>You may have to fudge the velocity or bc a bit to get the calcs to match the drops but it will be good and does away with the need for a chrono.</p><p></p><p>Good luck and good shootin'</p></blockquote><p></p>
[QUOTE="royinidaho, post: 263802, member: 2011"] Let's see: I come up with 62 clicks with a .25 moa per click at 100 yrds scope so thats 15.5 moa of up adjustment. Right? 62*.25 = 15.5 so that's a good calc. From Hornady's Ballistic Calculator: Why they don't go beyond 500 yds I don't know. Ballistics Calculation Input Variables Firearm typeRifle Sight Height1.5 Bullet Weight [I](grains)[/I]40 Ballistic Coefficient.275 Muzzle Velocity [I](fps)[/I]3600 Temperature60 Barometric Pressure [I](hg)[/I]29.53 Relative Humidity78% Zero Range [I](yards)[/I]100 Wind Speed [I](mph)[/I]0 JBM says 62 Clicks w/100 yd zero and 1.5 line of sight about line of bore will get you on at 725 yds. Sounds like you're spot on. Do an accurate determination of line of sight above line of bore. Then shoot for zero at different distances. You may have to fudge the velocity or bc a bit to get the calcs to match the drops but it will be good and does away with the need for a chrono. Good luck and good shootin' [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
How to tell how much MOA adjustment is left in my scope?
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