17 HMR windage

[flyguyskt]

well i've been looking around at ballistics charts but i can't really find anything good for the rimfire stuff. anyone have a good site i where i can figure out wind drift for the baby 17 grn vmax?

 

[emcon5]

You got me curious, so I did a little trial and error with a ballistics program. Knowing the bullet weight and velocity, I played around with the BC number until the program output for trajectory matches CCI's published numbers.

http://www.cci-ammunition.com/ballistics/detail.aspx?loadNo=0049

This is the one I used.
http://www.jbmballistics.com/~jbm/cgi-bin/jbmtraj_simp-5.0.cgi

I came up with a BC of 0.126 and matched CCIs numbers close enough.

 

[flyguyskt]

awesome thanks! ill test it to see if it works