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Rifles, Reloading, Optics, Equipment
Reloading
Chronographs
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<blockquote data-quote="Doozy" data-source="post: 2278110" data-attributes="member: 102153"><p>Interestingly, the basic Caldwell chronograph can measure from 5 fps to 9,999 fps, which is obviously better than LabRadar's. It also has an error rate of no more than +/- 0.25%, (that's a total range of 0.5%). MagnetoSpeed's V3 and Sporter accuracy is listed as "expected between 99.5% and 99.9%." Besides being a dumb way to write that (because by giving a range of accuracy they are saying it is never 100% accurate, which is obviously a mistake with their wording), they are saying it could be +/- 0.5% off, which is twice as bad as Caldwell's! (LabRadar's error is +/- 0.1%, but it cannot measure true muzzle velocity; it's impossible to if it's triggered by the sound of something moving faster than sound)</p><p></p><p>So this is all just to say that the mean green Caldwell machine is actually a very good chronograph, and may be what you want in certain circumstances.</p><p></p><p>(Edit: deleted an incorrect comment I made at the bottom; disregard my comment about LabRadar's accuracy only up to 1000 fps; the manual actually just gives an example of what +/- 0.1% means by saying +/- 1 mps @ 1000 mps)</p></blockquote><p></p>
[QUOTE="Doozy, post: 2278110, member: 102153"] Interestingly, the basic Caldwell chronograph can measure from 5 fps to 9,999 fps, which is obviously better than LabRadar's. It also has an error rate of no more than +/- 0.25%, (that's a total range of 0.5%). MagnetoSpeed's V3 and Sporter accuracy is listed as "expected between 99.5% and 99.9%." Besides being a dumb way to write that (because by giving a range of accuracy they are saying it is never 100% accurate, which is obviously a mistake with their wording), they are saying it could be +/- 0.5% off, which is twice as bad as Caldwell's! (LabRadar's error is +/- 0.1%, but it cannot measure true muzzle velocity; it's impossible to if it's triggered by the sound of something moving faster than sound) So this is all just to say that the mean green Caldwell machine is actually a very good chronograph, and may be what you want in certain circumstances. (Edit: deleted an incorrect comment I made at the bottom; disregard my comment about LabRadar's accuracy only up to 1000 fps; the manual actually just gives an example of what +/- 0.1% means by saying +/- 1 mps @ 1000 mps) [/QUOTE]
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