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Hunting
Long Range Hunting & Shooting
Adjusting bc or velocity to match drop
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<blockquote data-quote="Tumbleweed" data-source="post: 1478247" data-attributes="member: 9281"><p>Scope tracking, scope tracking and scope tracking. That's where I'd start. Do a tracking test at 100 yards and see what you come up with. From the sounds of it and from what I've experienced this could easily be playing into your error. It may not account for all of it but probably some. I mount scopes in a solid fixture separate from the rifle to do tracking tests and they are ALL OFF to some degree. My Burris' seem to undertrack very slightly and Leupolds typically overtrack a lot. </p><p></p><p>2nd, I'd recommend using Custom drag curves. There's no more messing with B/C's at different distances to make drops match. You zero, shoot once at distance to check drops and then put in a correction factor (if needed) to correct for your rifle's difference in regards to the established drag curve. Done. I use Hornady's 4DOF program...it's free. There's also Applied Ballistics which is in the $30 range.</p></blockquote><p></p>
[QUOTE="Tumbleweed, post: 1478247, member: 9281"] Scope tracking, scope tracking and scope tracking. That's where I'd start. Do a tracking test at 100 yards and see what you come up with. From the sounds of it and from what I've experienced this could easily be playing into your error. It may not account for all of it but probably some. I mount scopes in a solid fixture separate from the rifle to do tracking tests and they are ALL OFF to some degree. My Burris' seem to undertrack very slightly and Leupolds typically overtrack a lot. 2nd, I'd recommend using Custom drag curves. There's no more messing with B/C's at different distances to make drops match. You zero, shoot once at distance to check drops and then put in a correction factor (if needed) to correct for your rifle's difference in regards to the established drag curve. Done. I use Hornady's 4DOF program...it's free. There's also Applied Ballistics which is in the $30 range. [/QUOTE]
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Adjusting bc or velocity to match drop
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