BC for Hornady 140bthp

[ccurtis90]

I cannot find the G7 BC for 6.5 Hornady 140 bthp. Can anyone help me?

 

[teerex]

I took a look at my ballistic apps and it looks like it just converts the G1 to G7 for that bullet. A couple of the apps have Litz curves for bullets but only the 140 AMAX not the BTHP.

 

[turbo54]

I use the bullet library (NON-Litz) in JBM, and it works great to 1000 yards (don't know about further, haven't tried). I don't actually know my MV, so I made up dope cards for 2775, 2800, 2825 and 2850 and went to the range. The 2800fps card works.

 

[Ring]

no litz g7, but g1 converted to 7 = 0.2877

 

[Swift]

no litz g7, but g1 converted to 7 = 0.2877

Ring, what formula are you using to convert the BC? I think it was in his book but my brother bogarted my copy. If that .2877 is correct, I'll be switching to the AMAX cuz I've been using the Hdy match exclusively but if I'm not mistaken the AMAX G7 is .301 or thereabouts.

 

[Ring]

http://ballistics.gseven.com/

 

[gmz71]

Shooter says the G7 for 140 AMAX is .299