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Rifles, Reloading, Optics, Equipment
Muzzleloader Hunting
Determining BC and drop for big bullets
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<blockquote data-quote="dreamhunt" data-source="post: 1758793" data-attributes="member: 109852"><p>The most accurate way to get good BCs is to figure them yourself to your load and actual velocity. You need velocity at 2 different ranges muzzle and 100-200yds farther is better, preferably of the same shot. The Lab Radar chronograph makes this easy as it can be set to give readings from muzzle corrected to 200yds in increments. There are programs online that allow these numbers to be used to actually calculate the BC and drop tables. Keep in mind BCs do change a little with velocity, Height above sea level, atmospheric conditions. 2 chronographs set up one at 10 ft and the other at 200yds giving the velocites from each shot at each distance shows the velocity loss and allows the bc to be figured very accurately. It takes some time and work but will give you very accurate drop and wind tables</p><p><a href="http://castboolits.gunloads.com/newreply.php?s=431b7a58c75ff3511ce5255aab62155d&do=newreply&p=3875599" target="_blank">http://castboolits.gunloads.com/newreply.php?s=431b7a58c75ff3511ce5255aab62155d&do=newreply&p=3875599</a></p></blockquote><p></p>
[QUOTE="dreamhunt, post: 1758793, member: 109852"] The most accurate way to get good BCs is to figure them yourself to your load and actual velocity. You need velocity at 2 different ranges muzzle and 100-200yds farther is better, preferably of the same shot. The Lab Radar chronograph makes this easy as it can be set to give readings from muzzle corrected to 200yds in increments. There are programs online that allow these numbers to be used to actually calculate the BC and drop tables. Keep in mind BCs do change a little with velocity, Height above sea level, atmospheric conditions. 2 chronographs set up one at 10 ft and the other at 200yds giving the velocites from each shot at each distance shows the velocity loss and allows the bc to be figured very accurately. It takes some time and work but will give you very accurate drop and wind tables [URL='http://castboolits.gunloads.com/newreply.php?s=431b7a58c75ff3511ce5255aab62155d&do=newreply&p=3875599'][/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Muzzleloader Hunting
Determining BC and drop for big bullets
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