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G1 vs G7

 
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  #1  
Old 06-07-2011, 09:18 PM
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Join Date: Mar 2011
Posts: 110
G1 vs G7

Which are you guys using? I was just messing with my ballistics program and for my 270WSM with 130TSX @ 600 yards there is an elevation difference of 1.4MOA and with a full value 10mph wind there is a 1.6MOA difference..

At 1000 yards there is 5.1MOA of elevation difference..
Wondering if any of you have done any real world test's comparing the two drag models?

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  #2  
Old 06-07-2011, 09:36 PM
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Join Date: Jul 2007
Location: Billings, Mt
Posts: 797
Re: G1 vs G7

Quote:
Originally Posted by BuckSnort View Post
Which are you guys using? I was just messing with my ballistics program and for my 270WSM with 130TSX @ 600 yards there is an elevation difference of 1.4MOA and with a full value 10mph wind there is a 1.6MOA difference..

At 1000 yards there is 5.1MOA of elevation difference..
Wondering if any of you have done any real world test's comparing the two drag models?

I find the G7 to be much more accurate in real life after 500 yds. There isn't much difference that I have found in less than 500 yds. Still have to verify in the field but the G7 will get you a lot closer in my experience.

The main problem in the G1 is that some of the bullet manufacturers are a little too lenient or optimistic with their stated BC's in my opinion.

Go G7 and field verify and you will be good to go.
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  #3  
Old 06-07-2011, 09:42 PM
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Join Date: Jul 2004
Location: Texas
Posts: 5,501
Re: G1 vs G7

Quote:
Originally Posted by BuckSnort View Post
Which are you guys using? I was just messing with my ballistics program and for my 270WSM with 130TSX @ 600 yards there is an elevation difference of 1.4MOA and with a full value 10mph wind there is a 1.6MOA difference..

At 1000 yards there is 5.1MOA of elevation difference..
Wondering if any of you have done any real world test's comparing the two drag models?


Real world testing to me means actually firing at different distances. (100 yards to 1000yards)
and comparing the results with calculated drop tables using the G1 model and the G7 model.

Without exception the G7 model was closest to actual.

If you use a spitzer flat base the Gi is close because it closely matches the G1 Model. But for the
secant ogive boat tail bullets the G7 is the one to use.

Just what I have found.

J E CUSTOM
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  #4  
Old 06-07-2011, 11:25 PM
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Join Date: Apr 2010
Location: Allen, TX
Posts: 2,608
Re: G1 vs G7

Quote:
Originally Posted by BuckSnort View Post
[...]Wondering if any of you have done any real world test's comparing the two drag models?
not to split hairs... But, both models were developed in the real world.

Like JE points out, the best fit will depend on the type of bullet you use.

If neither works for you, then you may not be inputing all the right data.
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  #5  
Old 06-08-2011, 01:18 AM
Platinum Member
 
Join Date: Feb 2005
Location: Nevada
Posts: 2,782
Re: G1 vs G7

Quote:
Originally Posted by BuckSnort View Post
Which are you guys using? I was just messing with my ballistics program and for my 270WSM with 130TSX @ 600 yards there is an elevation difference of 1.4MOA and with a full value 10mph wind there is a 1.6MOA difference..

At 1000 yards there is 5.1MOA of elevation difference..
Wondering if any of you have done any real world test's comparing the two drag models?

It seems to me you may be doing something different. There should not be that much
difference at 600 yards. What values are you using for G1 and G7?
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Our Lord Jesus said that as it was in the days of Noah and
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  #6  
Old 06-08-2011, 07:09 AM
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Join Date: Jan 2010
Location: NC mountains
Posts: 508
Re: G1 vs G7

I use G7 for my ballistics calculator on my iPod and it is spot on.
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  #7  
Old 06-08-2011, 05:03 PM
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Join Date: Feb 2005
Location: Nevada
Posts: 2,782
Re: G1 vs G7

What vales are used for BC1 and BC7?
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-----------------------------

-----------------------------
HEBREWS 13:8
Jesus Christ the same yesterday, and to day, and for ever.

Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!!

---> As promised, God Sent His Prophet to us!
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