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Rifles, Reloading, Optics, Equipment
Reloading
Inconsistent Velocity
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<blockquote data-quote="baldhunter" data-source="post: 2811597" data-attributes="member: 11853"><p>[USER=117979][IMG alt="Salmonhead"]https://www.longrangehunting.com/data/avatars/m/117/117979.jpg?1647606019[/IMG][/USER]</p><p>[USER=117979]@Salmonhead[/USER] </p><p>[h4]Official LRH Sponsor[/h4]<p><strong>LRH Sponsor</strong></p><p>Joined Mar 6, 2021 Messages 329 Location <a href="https://www.longrangehunting.com/misc/location-info?location=Michigan" target="_blank">Michigan</a></p><ul> <li data-xf-list-type="ul"><a href="https://www.longrangehunting.com/threads/inconsistent-velocity.330203/post-2810065" target="_blank">Saturday at 6:56 AM</a></li> </ul> <ul> <li data-xf-list-type="ul">New</li> <li data-xf-list-type="ul"><a href="https://www.longrangehunting.com/posts/2810065/bookmark" target="_blank">Add bookmark</a></li> <li data-xf-list-type="ul"><a href="https://www.longrangehunting.com/threads/inconsistent-velocity.330203/post-2810065" target="_blank">#17</a></li> </ul><p>I've had two Caldwell chronographs and they varried wildly. Id use them simultaneously and consistently get about 70fps less from one of them. They were really bad when the sun was lower in the evening or if it was partly cloudy. Readings all over the place with known loads.</p><p></p><p>I have experienced this issue as well with other chronographs.It's how the chronograph sees the bullet as it crosses over two eyes.Just a fraction of difference can really change the velocity difference.I've had better consistency reading shooting downrange in a North or South direction as opposed to shooting in an East or West direction,especially in early and late shooting.It drove me crazy until I figured this out.I bought a Magneto after that if I want to check velocities.I found the Magneto speed can affect your group size,so if I want to check groups and velocity at the same time,I use my ProChrono and verify my velocity reading with the Magneto speed.I have two places I can shoot at my range.One is shooting towards the East.I only use my Magneto speed there.With my ProChrono,if I shoot there early in the morning,I've seen as much as a 100fps difference in just one hour with the same rifle and load due to the sun casting a shadow across the eyes on the chronograph.I can go the the other range where I'm shooting towards the North and the velocities don't change because the sun rays are shining across the side of the chronograph so the eyes can see the bullet equally and are comparable with the Magneto speed.</p></blockquote><p></p>
[QUOTE="baldhunter, post: 2811597, member: 11853"] [USER=117979][IMG alt="Salmonhead"]https://www.longrangehunting.com/data/avatars/m/117/117979.jpg?1647606019[/IMG][/USER] [USER=117979]@Salmonhead[/USER] [H4]Official LRH Sponsor[/H4] [B]LRH Sponsor[/B] Joined Mar 6, 2021 Messages 329 Location [URL='https://www.longrangehunting.com/misc/location-info?location=Michigan']Michigan[/URL] [LIST] [*][URL='https://www.longrangehunting.com/threads/inconsistent-velocity.330203/post-2810065']Saturday at 6:56 AM[/URL] [/LIST] [LIST] [*]New [*][URL='https://www.longrangehunting.com/posts/2810065/bookmark']Add bookmark[/URL] [*][URL='https://www.longrangehunting.com/threads/inconsistent-velocity.330203/post-2810065']#17[/URL] [/LIST] I've had two Caldwell chronographs and they varried wildly. Id use them simultaneously and consistently get about 70fps less from one of them. They were really bad when the sun was lower in the evening or if it was partly cloudy. Readings all over the place with known loads. I have experienced this issue as well with other chronographs.It's how the chronograph sees the bullet as it crosses over two eyes.Just a fraction of difference can really change the velocity difference.I've had better consistency reading shooting downrange in a North or South direction as opposed to shooting in an East or West direction,especially in early and late shooting.It drove me crazy until I figured this out.I bought a Magneto after that if I want to check velocities.I found the Magneto speed can affect your group size,so if I want to check groups and velocity at the same time,I use my ProChrono and verify my velocity reading with the Magneto speed.I have two places I can shoot at my range.One is shooting towards the East.I only use my Magneto speed there.With my ProChrono,if I shoot there early in the morning,I've seen as much as a 100fps difference in just one hour with the same rifle and load due to the sun casting a shadow across the eyes on the chronograph.I can go the the other range where I'm shooting towards the North and the velocities don't change because the sun rays are shining across the side of the chronograph so the eyes can see the bullet equally and are comparable with the Magneto speed. [/QUOTE]
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Inconsistent Velocity
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