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Long Range Hunting & Shooting
Question about the Shooter Ballistic Program?
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<blockquote data-quote="Broz" data-source="post: 862592" data-attributes="member: 7503"><p>Greyfox, I can not tell what you have going on. But I do believe you are on the right track. The difference between simply adjusting Velocity is it has a different effect across the board. BC, a slightly different effect and stepped BC's sometimes are also needed. When adjusting a turret calibration value, the difference is as you go out farther with a shot you dial more moa. If you have an error in turret calibration and are <strong>not</strong> spot on .25 moa this error will multiply as you shoot farther. These errors are very hard to detect at 100 yards, 200 yards or 300 yards. But start shooting past 1000, if they are truly there, they will show their ugly heads. I have found this to be the culprit with many scopes where I was satisfied with my drop being on to 1000 but then they were not so good farther out.</p><p> </p><p>I input the real average MV from a good chronograph. I use Magneto speed and Oehler. Then with the brand bullets I use I have proved BC's to be accurate, so I use the advertised BC. Then I go out and shoot drops out to as far as I will be using the rifle to hunt. If I find an increasing error with distance I adjust the turret calibration value to get it to come in. I usually do not have to change my MV much. Usually within the velocity spread of the ES string. Same with BC's. Only slight adjustments and only if needed for a fine tune.</p><p> </p><p>Hope this helps you. It does work for me.</p><p> </p><p>Jeff</p></blockquote><p></p>
[QUOTE="Broz, post: 862592, member: 7503"] Greyfox, I can not tell what you have going on. But I do believe you are on the right track. The difference between simply adjusting Velocity is it has a different effect across the board. BC, a slightly different effect and stepped BC's sometimes are also needed. When adjusting a turret calibration value, the difference is as you go out farther with a shot you dial more moa. If you have an error in turret calibration and are [B]not[/B] spot on .25 moa this error will multiply as you shoot farther. These errors are very hard to detect at 100 yards, 200 yards or 300 yards. But start shooting past 1000, if they are truly there, they will show their ugly heads. I have found this to be the culprit with many scopes where I was satisfied with my drop being on to 1000 but then they were not so good farther out. I input the real average MV from a good chronograph. I use Magneto speed and Oehler. Then with the brand bullets I use I have proved BC's to be accurate, so I use the advertised BC. Then I go out and shoot drops out to as far as I will be using the rifle to hunt. If I find an increasing error with distance I adjust the turret calibration value to get it to come in. I usually do not have to change my MV much. Usually within the velocity spread of the ES string. Same with BC's. Only slight adjustments and only if needed for a fine tune. Hope this helps you. It does work for me. Jeff [/QUOTE]
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Question about the Shooter Ballistic Program?
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