BC for 175 ELDX

[Wisconsinvette]

Can anyone help with BC on the 175 ELDX with a MV of 2800fps from an 8 twist barrel? I know the BC changes based on MV and twist.

 

[Tyler25246]

Applied ballistic numbers:
G1 .700
G7 .358

I could be wrong but I don’t think there is a way to calculate a trued bc to your load without more info.
But like I said I could be wrong.

(What I use for my bc is .347 in my 28 nosler 1-8 twist 3125 MV)

 

[Wisconsinvette]

Applied ballistic numbers:
G1 .700
G7 .358

I could be wrong but I don’t think there is a way to calculate a trued bc to your load without more info.
But like I said I could be wrong.

(What I use for my bc is .347 in my 28 nosler 1-8 twist 3125 MV)

Hornady lists the G1 at .689 and G7 at .347. I figured it would be lower than that.

 

[Tyler25246]

Hornady lists the G1 at .689 and G7 at .347. I figured it would be lower than that.

I started with the applied ballistics library numbers with the G7 of .358 but after trueing with my known MV from the labradar it came out to be .347 funny enough happened to be hornadys claimed G7😂
I will admit I’m not a guru in this stuff but what I’ve been doing works for me😂

What ballistic solver do you use?

 

[ARlife4me]

Try Hornady's site. I think the edlx and edlm are based on 400 yard bc's. At 2800 muzzle haow far are you looking to shoot?

 

[ARlife4me]

Using Hornady's bc calculator it wouldn't give bc results, only drop and drift adjustments for 175edlx @ 2,800fps. With their app you can go out to 2k yards.

 

[Wisconsinvette]

Try Hornady's site. I think the edlx and edlm are based on 400 yard bc's. At 2800 muzzle haow far are you looking to shoot?

I am going to practice to 1000 yards but on game I am looking at 800 yards to keep my impact velocity at 2000 fps.

 

[Wisconsinvette]

I started with the applied ballistics library numbers with the G7 of .358 but after trueing with my known MV from the labradar it came out to be .347 funny enough happened to be hornadys claimed G7😂
I will admit I’m not a guru in this stuff but what I’ve been doing works for me😂

What ballistic solver do you use?

I have always just used the Hornady ballistic calculator.

 

[ARlife4me]

Sierra is the only known (that I know) will give 3 bc's for most (usually rifle) at velocity between or at given speeds.

 

[gregsjt]

Actually, Hornady does the same thing:
Hornady BC's

 

[ARlife4me]

Actually, Hornady does the same thing:
Hornady BC's

I see g1 and g7, but not degrading bc's when velocity is less.

 

[gregsjt]

I see g1 and g7, but not degrading bc's when velocity is less.

Each bullet has a g1 and g7 for Mach 2.25, Mach 2, and Mach 1.75.

 

[Tyler25246]

I have always just used the Hornady ballistic calculator.

Might try out istrelok
I’m sure there is better ones but I use it works pretty good.

 

[dfanonymous]

View attachment 405356

This… ^
…and here’s the website link for those that insist on using Hornady’s published data.

Ballistic Coefficient - Hornady Manufacturing, Inc

...

www.hornady.com