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Posted: 6/5/2016 7:34:11 PM EDT
| I purchased a V3 about a month ago, and so far I love it. However, I noticed that it's giving velocities about 50-75fps faster than my Pro Chrono. Is this normal? If so, do you guys just deduct 50fps from your results and call it good? Or can it be "calibrated" somehow? |
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Yes but the 10 feet will not be a 50-75 fps difference. It's closer to 10 fps. When the Pro Chrono reads correctly, my 6.5 CM will only read about 7 fps different between the two chronos. However, the SD and ES readings are the same.
ETA: This is assuming you place your ProChrono 10 ft from the muzzle. |
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I had a chrony for probably 15 years before I got the magnetospeed. The chrony would show 100fps velocity swings from sun to shade, so it was useless on a partly cloudy day. The Magnetospeed has been remarkably consistent.
The chrony and pro chrono are both optical and neither is an Oehler, so I feel they are suspect. |
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I trust my Magnetospeed more than any of the cheaper traditional chronographs. No idea what they use. I bet it's quite a few different ones. My velocity rarely matches what the books show though. I'm using different brass, primers, barrel lengths, and sometimes twist rates. As far as I know (and in my testing with my 6.5CM) barrels tend to speed up a bit after 150-200 rounds as well. That's why it's important to chronograph your loads in your rifle. |
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I wish my Magnetospeed would give me stellar results...well it does, when it actually works. Been having a problem on my Sporter display module turning off and saying the bayo isn't plugged in. Magnetospeed is supposed to be sending one this week as a replacement. Also if the unit gets bumped, it records a shot of like 500 or so fps...so annoying. They believe it's a bad jack on the display unit.
But I concur with the above...when mine works, I trust the Magnetospeed as much as everything but a Lab Radar (which I hope to get within the next year  )
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