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Old 03-04-2021, 04:05 PM   #1
wellingtontx
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Default ? G7 BC for Sig Sauer .270 140 gr Elite Hunter EHT ?? Where to find G7 Data

Anybody know where to find the G7 BC for this particular factory ammo ? Ridiculous buy Sig does not include the information on their website. When you call and actually talk to a human - they have no clue where to get that information.
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Old 03-04-2021, 04:13 PM   #2
REDGUN
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I am clueless about factory ammo, but does this use a 140 gr Berger bullet (kind of sounds like it does)?

If it is the Berger 140gr bullet:

270 Caliber 140 Grain Classic Hunter
G7 BC: 0.271
G1 BC: 0.528

Last edited by REDGUN; 03-04-2021 at 04:18 PM.
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Old 03-04-2021, 04:34 PM   #3
wellingtontx
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Thank you so much for your help.


That is one of the problems, I think it is a Sierra bullet with what looks like a polymer tip. My guess is that it is a Sierra Gamechanger that they are making for Sig with a different colored tip. I found an article on the innerweb that said Sig was using Sierra bullets - but no confirmation.


If it is a Sierra Gamechanger then the G1 BC is .508 - but I am not educated enough on reloading or the physics to know what that means in terms of G7 - assuming that is the correct bullet. You would think Sig would know what they are selling - but they do not.

Last edited by wellingtontx; 03-04-2021 at 04:39 PM.
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Old 03-04-2021, 04:53 PM   #4
REDGUN
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Quote:
Originally Posted by wellingtontx View Post
You would think Sig would know what they are selling - but they do not.
Well, Sierra doesn't even list a G7 number for that bullet?...Ö.that doesn't make any sense either.
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Old 03-04-2021, 09:01 PM   #5
droptine8850
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https://www.jbmballistics.com/cgi-bin/jbmgf-5.1.cgi
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Old 03-04-2021, 10:03 PM   #6
175gr7.62
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I donít trust any published BC data. I shoot groups at 100, 200,300,400. 4 points on a parabola will get you dang close out to 1000 if you and your rifle shoot well.


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Old 03-05-2021, 09:14 AM   #7
wellingtontx
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Thanks everyone !!
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