how to find the ballistic coefficient 22lr

[futurerider103]

I've read the threads and I've not found info on how the bc is being found just a bunch of standard numbers. Can anyone help shed light on this?

 

[jdgray]

Re: how to find the ballistic coefficient 22lr

If you get good drop readings at a few distances, you could take your MV reading, and play around with the BC#s until your drops match.

 

[Country]

Re: how to find the ballistic coefficient 22lr

If you measured the velocity at two distances and then entered the data into this program it will give a BC http://www.jbmballistics.com/cgi-bin/jbmbcv-5.1.cgi
The correct Drag function to enter for a rimfire bullet would be RA4 but it is identical to G1 below 1400 fps.