August 28, 2023, 05:45 AM | #1 |
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Join Date: March 13, 2005
Location: Pennsylvania
Posts: 1,697
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Chrono advice needed
I have a PACT chronograph that is a bit cumbersome to set up but I've successfully used it since 1985 with rifles but I simply cannot get any readings when I try to chronograph handguns.
The recommended distance from the muzzle to the first sensor is 70 inches and both sensors should be 4 inches below the bullet path. The bullet path window under the sky screens is about 4"wide (bottom)x 12" wide (top) x 13" high. I've not tried to graph any bullets smaller than .44 (180gr) and .45 caliber. (250gr; 300gr). I can't understand why the unit can't see these fat bullets. Any ideas? |
August 28, 2023, 07:01 AM | #2 |
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Join Date: April 12, 2009
Posts: 741
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Color the bullet with a marker.
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August 28, 2023, 08:39 AM | #3 |
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Join Date: March 13, 2005
Location: Pennsylvania
Posts: 1,697
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I assume that stops the sunlight reflection -? Interesting. That's what the skyscreens are supposed to do, but I guess it depends on the angle of the sunlight?
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August 28, 2023, 09:05 AM | #4 |
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Join Date: October 20, 2006
Posts: 687
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cdoc...i feel your pain
i have an old chrony...used a lot in the old days...so i built a grendel and did some reverse bullet drop stuff with strelock to see how fast the vel was...and i thought i was close.... so i get the old chrony out ..put in a new batt..hey i came on...set it up shot a 22 over it ..hey it reads....so i set it up and fiddled with it ...to shoot the grendel over it...i couldnt get it to read anything out of the grendel...nutttin anyway.... i caught the magneto speed sporter on sale at optic planet and picked one up....oh my this thing is easy to set up and works pretty good too....glad i took the leap and got a new one...way easier than that other thing i dont use a chrono all the time...but i just wanted to see if i was close with the other method....not really but kinda..within 75fps...but thats a lot if you are tring to dial anyway i like the magneto speed...they make two different ones and i didnt really need the fancy one my .02 ocharry
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