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G7 vs G1 BC

 
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  #1  
Old 08-05-2013, 04:24 PM
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Join Date: Jul 2013
Location: NE Pennsylvania
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G7 vs G1 BC

Okay I'm new to this whole thing so please bear with me... Why is the difference between the two BC's and when do I use which one. Thanks
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  #2  
Old 08-05-2013, 05:10 PM
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Re: G7 vs G1 BC

A quick internet search produced this reuslt and it explains it pretty well: G1 vs. G7 Ballistic Coefficients — What You Need to Know Daily Bulletin
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  #3  
Old 08-05-2013, 05:16 PM
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Re: G7 vs G1 BC

They use different bullets for comparison. The G1 projectile is a flatbase shortnosed bullet, the G7 is a boattail pointed nose design. If you shoot a boattail bullet use the G7 coefficient.

Buy Applied Ballistics for Long Range Shooting, it will teach you the basic theory behind external ballistics applicable for lr shooting.
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  #4  
Old 08-05-2013, 10:20 PM
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Join Date: Oct 2012
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Re: G7 vs G1 BC

Quote:
Originally Posted by Beng View Post
They use different bullets for comparison. The G1 projectile is a flatbase shortnosed bullet, the G7 is a boattail pointed nose design. If you shoot a boattail bullet use the G7 coefficient.

Buy Applied Ballistics for Long Range Shooting, it will teach you the basic theory behind external ballistics applicable for lr shooting.
Yep, x2...great book too
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  #5  
Old 08-05-2013, 11:52 PM
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Location: Texas
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Re: G7 vs G1 BC

With the older style bullets the G1 was OK but now with all of the high BC bullets the old model is
just not accurate when trying to develop a drop chart.

The real problem is that the manufactures can use ether the G1 or the G7, and if you were a manufacture
would you want to say your bullet has a BC of .400 when everyone else was using the G1 method and claiming a BC of .700+.

In testing a long range load you will find that the G7 BCs are closer to actual drop And can be
very accurate to calculate ACTUAL BCs of your bullet.

If you can get past the lower numbers, the G7 method is the best.

Just my opinion

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