BC for Hornady 140gr AMAX (.264)

[shotdown]

Can someone tell me the correct BC for Hornady 140gr AMAX (.264) please? The Hornady website says it's .585. My Ballistic Cal says .580 but I could of swore it was .550. Anyway, is .585 the correct BC?

I tried searching but when I click on the link it takes me back to the main forum page.

 

[thespecialist]

.299 is the correct G7 BC, not sure about the G1

 

[shotdown]

Thanks. I was able to find the G7 but trying to confirm the G1.

 

[thespecialist]

It's .550, just found it

 

[shotdown]

Thank you!

 

[jfseaman]

It's .550, just found it

And as far as I can tell, it's accurate.

During load development, is used it in Strelok to move from 100 to 200 and then to 700. All elevations were dead on.

 

[ccurtis90]

This is the reason I asked the question about the 140 BTHP. On my Ballistic AE app, it shows 140 BTHP has a G1 of .580. It shows the 140 A-Max has a G1 of .550. However, on Hornady's site, the listed G1 for the A-Max is .585.

The G7 listed for the A-Max is .299. I cannot find a G7 for the BTHP.

I am so confused!

 

[Rob01]

It's .550, just found it

No it's not. It's .585. Bryan Litz tested it and got an average of .584.

 

[280nosler]

No it's not. It's .585. Bryan Litz tested it and got an average of .584.

THIS IS THE RIGHT ANSWER - Hornady updated it in their 7th edition to .585 G1.

 

[me124704]

Just double checked Litz's 2nd edition. G1 of .584 and G7 of .299.

 

[PSYOPS]

I use a G1 of .584 and it's dead-nuts on the money!

 

[shotdown]

No it's not. It's .585. Bryan Litz tested it and got an average of .584.

I didn't catch that update. Thanks.

I only have Ballistic...not Ballistic AE so I don't have the Litz BC.

 

[thespecialist]

No it's not. It's .585. Bryan Litz tested it and got an average of .584.

Looks like it's time for me to expand my book collection a little more. Thanks for the correction Rob

 

[swhiteh3]

Using calculators like Bulletflight, would using .299 G7 be more accurate than .584 G1?

(Interesting, Bulletflight's database shows .541 G1 for this round! Wow, glad I double checked!)

 

[shotdown]

I couldn't tell you as I've never used G7 data. I did use my Ballistic Calc exclusively during the last LR match and all my data was dead on with the G1 data at .584. Hopefully someone that has tested both will chime in.