Long Range Hunting Online Magazine Difference between G1 and G7 BC
 Home LRH Store Forums Long Range Rifles Articles Reviews Video G7 Ballistics Calculator Rules & FAQ Register Search Today's Posts Mark Forums Read

# Difference between G1 and G7 BC

#1
10-04-2010, 12:12 AM
 Bronze Member Join Date: Sep 2010 Location: Bay Area Posts: 76
Difference between G1 and G7 BC

What is the difference between the G1 and G7 measurement of ballistic coefficient measurements? I've seen both and the G7 number seems to be a lot lower? Reading up on ballistics and couldn't figure this out. Thanks
#2
10-06-2010, 06:24 AM
 Gold Member Join Date: Jun 2009 Location: Perry, Utah...now git off my lawn. Posts: 501
Re: Difference between G1 and G7 BC

Here's little bit about it. Ballistic coefficient - Wikipedia, the free encyclopedia
Also, do a search on this site for Brian Litz. He's the balistician for Berger Bullets.
__________________
Long Range Sickle
#3
10-06-2010, 10:43 PM
 Platinum Member Join Date: Jul 2004 Location: Texas Posts: 4,953
Re: Difference between G1 and G7 BC

Quote:
 Originally Posted by Precision_Game_85 What is the difference between the G1 and G7 measurement of ballistic coefficient measurements? I've seen both and the G7 number seems to be a lot lower? Reading up on ballistics and couldn't figure this out. Thanks
In layman's terms, it means that the G1 is based on a flat based spitzer and the comparison
between it and the new boat tail bullets will give you a much higher BC.

The G7 model is closer to the new bullet shape and this will give you a lower BC .

The G1 is preferred by some bullet makers because of the higher numbers . But for
the long range shooter the G7 will be closer in calculated trajectory to your actual
bullet drop so it is preferred for long rang shooting when calculating cold bore shots
at long distances.

J E CUSTOM
__________________
"PRESS ON"
#4
09-21-2012, 08:07 AM
 Junior Member Join Date: Dec 2004 Posts: 26
Re: Difference between G1 and G7 BC

Found this well written and easy-to-understand reference:

Berger Bulletin » A Better Ballistic Coefficient
#5
09-24-2012, 04:31 PM
 Silver Member Join Date: Mar 2007 Location: Dallas,OR Posts: 312
Re: Difference between G1 and G7 BC

+1 on JE Customs post. I have found that the G7 come ups were much closer to my actual findings using the high bc Berger bullets than the G1 values.
__________________
AKA "BLACKTAIL SNIPER"
7LRM smithed by Gunwerks
Stiller TAC 300
Broughton fluted 5.75, 5c @ 28"
Graphite Black Cerakote
Jewell Trigger
GreyBull Precision Stock
180VLD's@3145fps. with 72.8grs. of H1000, 215m primer

 Bookmarks

 Thread Tools Display Modes Linear Mode

 Similar Threads for: Difference between G1 and G7 BC Thread Thread Starter Forum Replies Last Post matt_3479 Long Range Hunting & Shooting 32 04-30-2010 11:51 AM Alfred Crouch Long Range Hunting & Shooting 33 06-24-2009 02:35 PM dwm Rifles, Bullets, Barrels and Ballistics 3 02-26-2009 12:25 AM summitsitter The Basics, Starting Out 9 02-23-2008 02:57 PM redbank Long Range Hunting & Shooting 7 06-29-2006 12:56 PM

 Current Poll Do you wear hearing protection while hunting? Usually do Usually do not No but I probably will in future
 Current Poll - 2 Do you have a high speed Internet connection? Yes, DSL, satellite, wireless or something else. - 89.19% No, only dialup right now. - 10.81% Total Votes: 3,052You may not vote on this poll.

All times are GMT -5. The time now is 10:51 AM.