What is the BC of FX 50.2 grain pellet

[ndwind]

I've looked all over online and I can't find the BC of the FX 30 cal 50.2 grain pellet. I need that to enter in the balistics app of my Arken Zulus. I have the velocity at the bench and at fifty feet. But I don't k ow how to calculate it.
Out of 250mm Edgun
703 fps at the muzzeloaders
678 at fifty feet
Any help is appreciated! I'm not a math wiz.

 

[Theman406]

Should be around 0.047 but to accurately figure it out you need a 10 shot average.

 

[ndwind]

Should be around 0.047 but to accurately figure it out you need a 10 shot average.

Those velocity are ten shot averaging over the Garmin

 

[Ballisticboy]

Using EasyBC, the GA reference drag law and assuming an ICAO temperature and pressure, the BC from your velocities and range is .057. However, you need the atmospheric temperature and pressure for a realistic figure.

 

[ndwind]

Thank you very much for the replies. I'll load that into the profile and try it out!

 

[rangur1]

No offense offered! I’m a shooting illiterate as far as BC is concerned, I’d wing them out there at whatever distance and see what groups. At 40,75,100 , whatever. Either it does or doesn’t. I’m I being lazy or simplistic? Feel free to CONSTUCTIVELY criticize. With respect,
Thank you.

 

[Ezana4CE]

I've looked all over online and I can't find the BC of the FX 30 cal 50.2 grain pellet. I need that to enter in the balistics app of my Arken Zulus. I have the velocity at the bench and at fifty feet. But I don't k ow how to calculate it.
Out of 250mm Edgun
703 fps at the muzzeloaders
678 at fifty feet
Any help is appreciated! I'm not a math wiz.

Here's an in-house BC calculator. I'm not so advanced to where I'm concerned with BC, but I thought it might help someone. To my understadning ballistic coefficient changes as the variables change.

Airgun Calculators

https://www.airgunnation.com/calculators/

www.airgunnation.com

 

[ndwind]

Here's an in-house BC calculator. I'm not so advanced to where I'm concerned with BC, but I thought it might help someone. To my understadning ballistic coefficient changes as the variables change.

Airgun Calculators

https://www.airgunnation.com/calculators/

www.airgunnation.com

Here's an in-house BC calculator. I'm not so advanced to where I'm concerned with BC, but I thought it might help someone. To my understadning ballistic coefficient changes as the variables change.

Airgun Calculators

https://www.airgunnation.com/calculators/

www.airgunnation.com

thanks i guess i should have looked at that! now that i know its there as well as oyher good calculaators ill use it. like calculating the BC of my Corbin swaged slugs.

 

[Ezana4CE]

thanks i guess i should have looked at that! now that i know its there as well as oyher good calculaators ill use it. like calculating the BC of my Corbin swaged slugs.

Keep in mind that there isn't a field to input atmospheric pressure and temperature, so I'm not sure how accurate the figures you get from the AGN calculator will be. I'm sure there are other online calculators, but some other members will have to chime in here. I'm really not knowledgable in this area.

 

[Ballisticboy]

I really wouldn't use the BC calculator if it is still the old constant Cd ref one, at higher speeds it is hopelessly inaccurate. Better to use Chairgun or EasyBC.