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Numbers to remember
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<blockquote data-quote="Ian M" data-source="post: 6305" data-attributes="member: 25"><p>Dave,</p><p>I have one drop-chart in my mind - 19minutes at 700 yards, the rest is pretty much fuzz. Maybe we shoot at 700 too much, more likely that I am too dumb to remember the rest. Problem with this is I make a few shots at 100 yards that hit 19 inches high every so often...</p><p></p><p>Your comeups are good, here are some for the 175 BHA match ammo, as per the Ballisticard that BHA has had made up.</p><p></p><p>100 0.0 600 15.7</p><p>150 0.8 650 17.9</p><p>200 2.0 700 20.2</p><p>250 3.3 750 22.7</p><p>300 4.8 800 25.3</p><p>350 6.4 850 28.1</p><p>400 8.0 900 31.0</p><p>450 9.8 950 34.1</p><p>500 11.7 1000 37.4</p><p>550 13.6</p><p>(hope that this does not turn into a dog's-breakfast when it hits the internet)</p><p></p><p>The wind card for these 175's for a 10mph full value wind is one moa at 1 & 200, then one less number than the first digit of the distance out to 1000. Even I can remember that one, 9 minutes at 1000. For the 168 it works out to 800, then the same number as the distance ie 10 at 1000. Surprising how well this works, at least it is a good starting point. Your offsets sound very reasonable. I have the .300Win card, also one for a Weatherby that jibe.</p><p></p><p>These are only numbers, I usually use 18.75-19.5 moa at 700 rather than 20.2, but they are close. Obviously barometric pressure, barrel length etc. are involved when fine-tuning.</p><p>What the hell is a grommet? Do I really need one to shoot long <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> You always have all the good toys...</p></blockquote><p></p>
[QUOTE="Ian M, post: 6305, member: 25"] Dave, I have one drop-chart in my mind - 19minutes at 700 yards, the rest is pretty much fuzz. Maybe we shoot at 700 too much, more likely that I am too dumb to remember the rest. Problem with this is I make a few shots at 100 yards that hit 19 inches high every so often... Your comeups are good, here are some for the 175 BHA match ammo, as per the Ballisticard that BHA has had made up. 100 0.0 600 15.7 150 0.8 650 17.9 200 2.0 700 20.2 250 3.3 750 22.7 300 4.8 800 25.3 350 6.4 850 28.1 400 8.0 900 31.0 450 9.8 950 34.1 500 11.7 1000 37.4 550 13.6 (hope that this does not turn into a dog's-breakfast when it hits the internet) The wind card for these 175's for a 10mph full value wind is one moa at 1 & 200, then one less number than the first digit of the distance out to 1000. Even I can remember that one, 9 minutes at 1000. For the 168 it works out to 800, then the same number as the distance ie 10 at 1000. Surprising how well this works, at least it is a good starting point. Your offsets sound very reasonable. I have the .300Win card, also one for a Weatherby that jibe. These are only numbers, I usually use 18.75-19.5 moa at 700 rather than 20.2, but they are close. Obviously barometric pressure, barrel length etc. are involved when fine-tuning. What the hell is a grommet? Do I really need one to shoot long [img]images/icons/grin.gif[/img] You always have all the good toys... [/QUOTE]
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