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Rifles, Reloading, Optics, Equipment
Reloading
Trying to lower ES in .260 AI
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<blockquote data-quote="Greyfox" data-source="post: 1224758" data-attributes="member: 10291"><p>Between your group size and results at long range I would say you needn't be concerned about the ES you are getting from your chrono. You didn't mention what type of chronograph you are using, but I have had similar issues with ES using optical chronographs. My groups at short and long range were perfect but my ES was very high using mu Oehler 35. This was with my 6.5x284 using Berger !40 VLD's. When I switched to !40 JLK VLD's my ES dropped to under 8 FPS. The shooting results were just about identical at short and long range though. The notable difference between the two was the dull finish on the JLK"s as compared to the high polish on the Bergers. Thinking that this could be the cause, I dulled the Bergers with a Sharpie. My ES decreased dramatically. I think the ES variation was due to the glint of the shiny surface of the Bergers effecting the readings. I have since upgraded my chrono to a Magneto Speed, and more recently a LabRadar and have not experienced this issue. </p><p>I'm not sure this is your issue, but for those using optical chronographs it may be something to keep an eye on.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1224758, member: 10291"] Between your group size and results at long range I would say you needn't be concerned about the ES you are getting from your chrono. You didn't mention what type of chronograph you are using, but I have had similar issues with ES using optical chronographs. My groups at short and long range were perfect but my ES was very high using mu Oehler 35. This was with my 6.5x284 using Berger !40 VLD's. When I switched to !40 JLK VLD's my ES dropped to under 8 FPS. The shooting results were just about identical at short and long range though. The notable difference between the two was the dull finish on the JLK"s as compared to the high polish on the Bergers. Thinking that this could be the cause, I dulled the Bergers with a Sharpie. My ES decreased dramatically. I think the ES variation was due to the glint of the shiny surface of the Bergers effecting the readings. I have since upgraded my chrono to a Magneto Speed, and more recently a LabRadar and have not experienced this issue. I'm not sure this is your issue, but for those using optical chronographs it may be something to keep an eye on. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Trying to lower ES in .260 AI
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