Hy Guys!
i have a little question, what do you wrote in the section of „temperature co-efficiency“ for pellets?
i have a little question, what do you wrote in the section of „temperature co-efficiency“ for pellets?
StrelokPro
- Thread starter Patrick
- Start date
Patrick, did you mean "ballistic coefficient" (=BC)?
Most enter a value from one of the BC lists on the internet (some of us measure the BC of their preferred pellets in their specific setup).
For a comprehensive list of published BC numbers in .22 cal (only high BC pellets), cf.
https://www.airgunnation.com/topic/bc-table-22cal-comprehensive-internet-wide-collection-of-ballistic-coeff-data/
For a BC test with different calibers by HardAir Magazine, cf.
https://hardairmagazine.com/ballistic-coefficients
BC changes with velocity, so if you are shooting long and extreme long range (50y, 100y, and more) the have more exact calculations you would enter a variable BC.
This is an area that we are just beginning to explore. Bob Sterne has done some testing, here is one for JSB in .22cal:
https://www.gatewaytoairguns.org/GTA/index.php?topic=14735.msg1265217#msg1265217
SMH77 (Sean) is in the process of doing the larger calibers. Look him up on this forum to find his data.
Most enter a value from one of the BC lists on the internet (some of us measure the BC of their preferred pellets in their specific setup).
For a comprehensive list of published BC numbers in .22 cal (only high BC pellets), cf.
https://www.airgunnation.com/topic/bc-table-22cal-comprehensive-internet-wide-collection-of-ballistic-coeff-data/
For a BC test with different calibers by HardAir Magazine, cf.
https://hardairmagazine.com/ballistic-coefficients
BC changes with velocity, so if you are shooting long and extreme long range (50y, 100y, and more) the have more exact calculations you would enter a variable BC.
This is an area that we are just beginning to explore. Bob Sterne has done some testing, here is one for JSB in .22cal:
https://www.gatewaytoairguns.org/GTA/index.php?topic=14735.msg1265217#msg1265217
SMH77 (Sean) is in the process of doing the larger calibers. Look him up on this forum to find his data.
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Hy jungleshooter!
Thanks for your answer, but thats complete clear to me.
that what i mean has to do how Temperature affects bullet Speed.
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Temperature does have an affect on PCP rifles. For example when I go outside and it’s 20 degrees out and I about I loose a little fps.
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Ok, You already know that denser air decreases pellet speed. Well, the ambient air temp has an inverse effect on air density. When air temp increases, air density decreases.
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when you sight in your scope you should also chronograph the speed. When you enter your sight in data in strelok you enter the temp, altitude, barometric pressure and velocity you got while sighting in. Then when you go out shooting strelok will take the same data and compare the change in temp, altitude and baro pressure against the data you entered when sighting in and correct your hold overs to match the change in that data. I think allot of people enter that data incorrectly or completely ignore it. Then when they go shoot longer distances like 50+ yds the hold overs dont match the real drop of the pellet.
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Wow thanks for all your answers guys!
i really appreciate it!
i have the same Issue with StrelokPro by not writing the correct datas. Then i thought i ask u guys here for help.
i really appreciate it!
i have the same Issue with StrelokPro by not writing the correct datas. Then i thought i ask u guys here for help.
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