All Springer/NP/PCP Air Gun Discussion General > Big Bore AirGun Gate
Tricks for getting chrony readings?
rkr:
I have a very powerful bigbore, it shoots 175 grainers from 1300 to 1800 fps ... or that's what my beta chrony says it does. I'm trying to test my .45 in my garage and thus I need to set up the chrony quite close to gun, about 2-3 feet away, and the air blast is seriously screwing up the readings. Are there any neat tricks I could use to get proper readings without installing a silencer? The chrony has small led lights over the sensor holes so I need to be able to aim the gun quite precisely over the sensors.
Back_Roads:
I run a Caldwell indoors with it the same distance, but never at that energy level :o my bigger bores get tested outdoors, but I use this clamp on portable unit, it has survived many .50 cal. rounds.
rkr:
I have one of those chinese chronos as well but it doesn't work any better, the big airblast keeps giving way too high readings. I should be shooting around 800 fps (barrel limited) with current tune so it's not that powerful, just blowing out a lot of air that confuses the chrony.
PasadenaMike:
--- Quote from: rkr on January 09, 2023, 09:35:53 AM ---I have one of those chinese chronos as well but it doesn't work any better, the big airblast keeps giving way too high readings. I should be shooting around 800 fps (barrel limited) with current tune so it's not that powerful, just blowing out a lot of air that confuses the chrony.
--- End quote ---
Problem solved https://utahairguns.com/fx-pocket-chronograph/
gendoc:
--- Quote from: MikeCarter on January 09, 2023, 09:45:06 AM ---
--- Quote from: rkr on January 09, 2023, 09:35:53 AM ---I have one of those chinese chronos as well but it doesn't work any better, the big airblast keeps giving way too high readings. I should be shooting around 800 fps (barrel limited) with current tune so it's not that powerful, just blowing out a lot of air that confuses the chrony.
--- End quote ---
Problem solved https://utahairguns.com/fx-pocket-chronograph/
--- End quote ---
what he said ...................^^^^^^^^^^^^^^^^
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