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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
ballistics question
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<blockquote data-quote="AKSavage" data-source="post: 1280743" data-attributes="member: 95938"><p>You beat me too it. This is exactly what I had in mind. As I read these numbers, (and correct me if I'm wrong) my windage would be dead on if I hold windage for a 600 yard flat shot. I wish I could say my hunting rifles shoot less than .36 MOA (less than 2.5" diameter group at 600 yards), but most are good to .5 MOA at best.</p><p></p><p>Keeping in mind that when we say a rifle shoots .5 MOA that means +/- .25 MOA, let's add some more wiggle room and say my rifle (and I) only shoot 1 MOA groups (+/- about 3") at 600 yards. That means if I dial the "range card elevation" for a 500 yard flat shot (8.09 MOA) and windage for a 600 yard shot flat shot (3.13 MOA) my windage error would be at most .5 MOA = 3" (all rifle error) and my elevation error would be *at most* .86 MOA = 5.25" (.5 rifle + .36 calculation error).</p><p></p><p>That is to say: the calculation error is a LOW miss by .36 MOA, so the *worst case scenario* is a hit about 5" below point of aim. Best case scenario, the rifle shoots .5 MOA high and the calculation error puts me .36 MOA low, and POI would be .14 MOA (3/4") ABOVE point of aim. The 5" worst case low miss would be pushing the limits of what I can shoot using just a printed range card. Good to know your limits. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /></p></blockquote><p></p>
[QUOTE="AKSavage, post: 1280743, member: 95938"] You beat me too it. This is exactly what I had in mind. As I read these numbers, (and correct me if I'm wrong) my windage would be dead on if I hold windage for a 600 yard flat shot. I wish I could say my hunting rifles shoot less than .36 MOA (less than 2.5" diameter group at 600 yards), but most are good to .5 MOA at best. Keeping in mind that when we say a rifle shoots .5 MOA that means +/- .25 MOA, let's add some more wiggle room and say my rifle (and I) only shoot 1 MOA groups (+/- about 3") at 600 yards. That means if I dial the "range card elevation" for a 500 yard flat shot (8.09 MOA) and windage for a 600 yard shot flat shot (3.13 MOA) my windage error would be at most .5 MOA = 3" (all rifle error) and my elevation error would be *at most* .86 MOA = 5.25" (.5 rifle + .36 calculation error). That is to say: the calculation error is a LOW miss by .36 MOA, so the *worst case scenario* is a hit about 5" below point of aim. Best case scenario, the rifle shoots .5 MOA high and the calculation error puts me .36 MOA low, and POI would be .14 MOA (3/4") ABOVE point of aim. The 5" worst case low miss would be pushing the limits of what I can shoot using just a printed range card. Good to know your limits. :cool: [/QUOTE]
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