- I have just recently purchased a new Alpha Master Chrony. Can anyone share info about the do's and do not', mannerisms, styles, advice etc. about these devices?
Here is a question that was asked on Straigtshooters Blog. Q:How do you guy's get the results at the different yardage. For instance, do you set a chrony out to that distance? or do you just use a calculator. Hope this is not a stupid question. In the meantime, thanks for all the great work you guys do. It seems that straightshooters' is main page for truth in velocity test.
Answer: That is a LONG story with many parts to it. But I'll give you the condenses version. Years ago, when we purchased the extremely expensive Oehler chronographs ($1000 apiece) we started the testing by placing one chronograph 6' in front of the muzzle and the other one at 10 yds, 25 and 50 yds. We'd move the farther one to whatever distance was needed. After testing 6-8 guns originally, we ran into winter and had to stop testing. Over the winter, we took some of the guns we had tested, retested them with the farther chrony at 10 yards. We synched both chronographs to make sure they have the same readings because these chronies allow multiple units to be synchronized for perfect accuracy. Then we re-tested some of the gun to see if the calculations would be anywhere near the actual results we had gotten from putting the chronographs at the actual 25 and 50 yard markers. The results were within 5 fps or less for all the guns retested when set to do actual flight simulations.
So on further tests, we just run one at 6' in front of the muzzle and the other at 10 yards. The calculations have proven to be just as accurate and we can test year round. I don't think 5 fps difference will bother anybody because pellet weight variance can cause more difference than that. That's the short version. We still do cross-tests to verify accuracy once in awhile and so far, so good.
Kevin
(Special thanks to the guys at Straightershooters)
Dave @ vbch
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