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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A tale of two chrony's
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<blockquote data-quote="Pdvdh" data-source="post: 344814" data-attributes="member: 4191"><p>I think you need to determine your scope's click values before using the number of clicks required to match LoadBase predictions as an effort to determine MV or which Chronograph is reading correctly or incorrectly. Even then, chronographed velocities are the way to determine MV. Not measured bullet drops. Scope click values are something that can be precisely determined. Once known, you can enter the exact value into LoadBase - which removes one source of potential error from your analysis of the problem. </p><p></p><p>Clearly something is up with one or both of the chronographs if readings differ by 100 fps. Now you need a third one to add to the two so you can figure out which one gives the bogus readings. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> Well... seriously, maybe you know someone that has a chronograph that you could borrow for one shooting session. That's what I'd look at doing next. And if you buy a third one, look for a used Oehler model 33 or 35. My Oehler seems to be pretty reliable.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 344814, member: 4191"] I think you need to determine your scope's click values before using the number of clicks required to match LoadBase predictions as an effort to determine MV or which Chronograph is reading correctly or incorrectly. Even then, chronographed velocities are the way to determine MV. Not measured bullet drops. Scope click values are something that can be precisely determined. Once known, you can enter the exact value into LoadBase - which removes one source of potential error from your analysis of the problem. Clearly something is up with one or both of the chronographs if readings differ by 100 fps. Now you need a third one to add to the two so you can figure out which one gives the bogus readings. :D Well... seriously, maybe you know someone that has a chronograph that you could borrow for one shooting session. That's what I'd look at doing next. And if you buy a third one, look for a used Oehler model 33 or 35. My Oehler seems to be pretty reliable. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A tale of two chrony's
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