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Magneto Speed
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<blockquote data-quote="J E Custom" data-source="post: 1629483" data-attributes="member: 2736"><p>You are doing everything right, but to get the adjusted BC of the bullet you have to use the muzzle velocity of the chronograph. </p><p>change the Bullet BC to match the trajectory on the bullet to the actual trajectory using the muzzle velocity you have.</p><p></p><p>Conditions, altitude, temperature and many other factors have a effect on the bullet performance and most bullets have 3 different BCs during the flight to target.</p><p></p><p>Living on the gulf coast, I have to use different Bullet BCs than the manufacture claims to get trajectories that match charted/calculated velocities. </p><p></p><p>This is not uncommon and is the best way to get good information to input into ballistic calculators. Before these tools were available, we used drop charts and the chronograph to get unknown zeros for match shooting. These distances could change from 200 yards to 1200 yards depending on the match. and most of us may only have access to 600 yard ranges to verify all zeros.</p><p></p><p>Keep changing the bullet BC until you get a close match.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1629483, member: 2736"] You are doing everything right, but to get the adjusted BC of the bullet you have to use the muzzle velocity of the chronograph. change the Bullet BC to match the trajectory on the bullet to the actual trajectory using the muzzle velocity you have. Conditions, altitude, temperature and many other factors have a effect on the bullet performance and most bullets have 3 different BCs during the flight to target. Living on the gulf coast, I have to use different Bullet BCs than the manufacture claims to get trajectories that match charted/calculated velocities. This is not uncommon and is the best way to get good information to input into ballistic calculators. Before these tools were available, we used drop charts and the chronograph to get unknown zeros for match shooting. These distances could change from 200 yards to 1200 yards depending on the match. and most of us may only have access to 600 yard ranges to verify all zeros. Keep changing the bullet BC until you get a close match. J E CUSTOM [/QUOTE]
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