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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 300gr BC
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<blockquote data-quote="Fiftydriver" data-source="post: 430440" data-attributes="member: 10"><p>You might want to play with the multipul BC feature of your program if it has one. You can set a new BC for each velocity level set as the bullet travels down range. I have had to do this many times.</p><p> </p><p>Looks like you could tweak your BC a bit and be much closer down range as the acutal drops seem to be somewhat consistant as far as the amount of difference from recommended drop.</p><p> </p><p>Make sure you have your Bar pressure set up properly for your elevation and not set for sea level. Also make sure your on with the temp and humidity.</p><p> </p><p>I have at times had to also adjust my zero range to get down range drops to match up. I could really care less if I am supposed to have a 300 zero but in fact I have a 275 yard zero as long as the trajectory trips the down range drop estimates correctly. </p><p> </p><p>Its nearly always required to manipulate the drop charts to match actual bullet flight so you should be able to get it very close. In the end, remember we only want to make a model of the actual bullet flight, what numbers we use to get that really does not matter as long as it matches actual bullet flight.</p><p> </p><p>Also remember to consider up and down drafts, especially at longer ranges. Up drafts and down drafts act on a bullet just as wind does with drift, only in the vertical plain. Its not as dramatic as wind drift but it DOES happen and can really cause problems with developing a drop chart.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 430440, member: 10"] You might want to play with the multipul BC feature of your program if it has one. You can set a new BC for each velocity level set as the bullet travels down range. I have had to do this many times. Looks like you could tweak your BC a bit and be much closer down range as the acutal drops seem to be somewhat consistant as far as the amount of difference from recommended drop. Make sure you have your Bar pressure set up properly for your elevation and not set for sea level. Also make sure your on with the temp and humidity. I have at times had to also adjust my zero range to get down range drops to match up. I could really care less if I am supposed to have a 300 zero but in fact I have a 275 yard zero as long as the trajectory trips the down range drop estimates correctly. Its nearly always required to manipulate the drop charts to match actual bullet flight so you should be able to get it very close. In the end, remember we only want to make a model of the actual bullet flight, what numbers we use to get that really does not matter as long as it matches actual bullet flight. Also remember to consider up and down drafts, especially at longer ranges. Up drafts and down drafts act on a bullet just as wind does with drift, only in the vertical plain. Its not as dramatic as wind drift but it DOES happen and can really cause problems with developing a drop chart. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 300gr BC
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