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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity and BC?
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<blockquote data-quote="Mysticplayer" data-source="post: 83747" data-attributes="member: 8947"><p>A couple of ways to check. At 100yds, put up a tape measure on a board. Zero the rifle at the bottom (shoot a rd). Dial up the scope and shoot at the different come ups. See where the bullets actually land.</p><p></p><p>If the scope is off, you will quickly see. Example, you dial up 10 min but your actual bullet impacts 12 min high. The scope moves more then expected so it looks like your bullet is flying flatter then it actually does.</p><p></p><p>If all the come ups check out, shoot at your favorite distances but on a MOA sized target. Shooting and hitting a 40" rock does allow for some degree of error (2MOA or more). If you shoot and hit a 11" target at 1100yds, well then you would have to say things are dialed in.</p><p></p><p>Finally, what drag function are you using in your data. That is the G number usually required. Most programs default to G1 which is usually wrong for boattail bullets.</p><p></p><p>If everything else checks out, change the G function but keep all other data the same. It might bring your data in line with real world observations.</p><p></p><p>That is what I had to do with recent shooting of the 162gr Amax from 2 7RM. By changing the G function, I was able to get my data and real world come ups to agree.</p><p></p><p>Hope this helps. Try and get yourself a chronie. Would reduce the amount of guesswork.</p><p></p><p>Jerry</p></blockquote><p></p>
[QUOTE="Mysticplayer, post: 83747, member: 8947"] A couple of ways to check. At 100yds, put up a tape measure on a board. Zero the rifle at the bottom (shoot a rd). Dial up the scope and shoot at the different come ups. See where the bullets actually land. If the scope is off, you will quickly see. Example, you dial up 10 min but your actual bullet impacts 12 min high. The scope moves more then expected so it looks like your bullet is flying flatter then it actually does. If all the come ups check out, shoot at your favorite distances but on a MOA sized target. Shooting and hitting a 40" rock does allow for some degree of error (2MOA or more). If you shoot and hit a 11" target at 1100yds, well then you would have to say things are dialed in. Finally, what drag function are you using in your data. That is the G number usually required. Most programs default to G1 which is usually wrong for boattail bullets. If everything else checks out, change the G function but keep all other data the same. It might bring your data in line with real world observations. That is what I had to do with recent shooting of the 162gr Amax from 2 7RM. By changing the G function, I was able to get my data and real world come ups to agree. Hope this helps. Try and get yourself a chronie. Would reduce the amount of guesswork. Jerry [/QUOTE]
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Velocity and BC?
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