Hammer Bullets 340 Wby question on coefficient and ballistics

[knifecat]

Shooting the 246 Hammer Hunter. 2800 FPS
It says on hammer website the BC is g7- BC = .279

So what do I put in for BC when I am on ballistics calculator.?? I am just an old country boy and not sure what all the G7 means in regards to what I am asking. Sorry for sounding dumb. It is a one hole gun tho... lol

 

[FEENIX]

Shooting the 246 Hammer Hunter. 2800 FPS
It says on hammer website the BC is g7- BC = .279

So what do I put in for BC when I am on ballistics calculator.?? I am just an old country boy and not sure what all the G7 means in regards to what I am asking. Sorry for sounding dumb. It is a one hole gun tho... lol

Your apps should give you an option for either G1 or G7:

 

[sable tireur]

So what do I put in for BC when I am on ballistics calculator.?? I am just an old country boy and not sure what all the G7 means in regards to what I am asking.

In ballistics, the ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight.

What is the difference between G1 BC and G7 BC?

The difference between G1 BC and G7 BC is that the G7 BC is more representative of modern long-range bullets. The G1 BC has traditionally been the 'standard projectile' used to define BCs for the entire sporting arms industry. The problem herein lies that Berger Bullets aren't standard projectiles. Berger Bullets are modern long-range bullets capable of extreme precision. The standard G7 projectile has a long boat tail and pointed ogive as compared to the old G1 projectile which has a short nose, flat base and bears more resemblance to a pistol bullet than to a modern high velocity long range rifle bullet.

Another reference:

https://www.ssusa.org/content/g1-vs-g7-ballistic-coefficients/

Enjoy the process!

 

[David_h]

I was told by the guys at Hammer to multiply G7 x2 to obtain decent estimate of G1 value.

 

[Zen Archery]

Go here https://www.jbmballistics.com/cgi-bin/jbmgf-5.1.cgi