Berger Bullets' Move To The G7 Standard BC By Bryan Litz

[ADMIN]

A Better Ballistic Coefficient
For centuries now, science has been helping us gain a more accurate understanding of our world. The branch of science we care about as shooters is known as ballistics. The science of ballistics is well developed and understood by those who study it, but the tools and information being used by average shooters is not necessarily optimal for the shooter’s applications.

In other words, there is a better, more accurate way for shooters to use ballistics to help them predict trajectories and hit targets. The purpose of this article is to present a better way for shooters to calculate ballistics.Read More...

This is a thread for discussion of the article, Berger Bullets' Move To The G7 Standard BC , By Bryan Litz. Here you can ask questions or make comments about the article.

[birdrl]

A very good article. Explained a lot of things I did not understand. Thank you.

[ODAVID]

Excellent article Very informative. I am developing a Balistic table based on Actual range results showing the POI at 100-200-400-600-800-1000 yards. The POI is consistent for the ranges but the table does not corelate. I feel this is because of the Bullet BC value.

Can you share with me the G7 BC for the Berger 168 gr 7mm Hunting bullet leaving the muzzle at 3300fps????

Can you also share with me the G7 BC for Nosler Accubond bullet 160 grain leaving the muzzle at 3220 fps??

I assume these G7 BC will be the same throughout the entire range I shoot??

How much of a varible is the Fps for the Balistic table????


Thank you so much

[jonoMT]

I had observed on another thread that the G7 BC varies much less than G1. Thanks for the explanation why. (If I am correct, that is because the G7 bullet model is much more similar to the shape of modern projectiles such as the VLDs).

To be honest, I hadn't given much consideration to trying yet another bullet brand but I'm impressed with Berger. I've got 6 hours of range time Saturday so am going to load some 168 or 175s...if I can find some locally!

[ctressler]

Great article and thank you for the links to the software

[bubbinator]

I recently read an article in Shooting Times or Guns & Ammo on this same subject. It stated that ballistic coeffients were calculated on values based on the GI .50 Cal machine gun round. That round was given a BC of 1.000 and all others were compared to that. In reviewing the BCs given to various bullets, for example a 220gr. .30 roundnose projectile VS a 175gr. HPBT Match projectile, that system of comparisons makes it easy for me, at least, to visulalise the BC values. Is there any substance to that comparison? Thanks for your input, enjoyed your article a lot.

[Eaglet]

True!!!,

Will Berger print on their boxes the new G7 BC only or will they

start out in a wiser manner like printing the G1 and G7 on their boxes

for some time until more folks get educated on the matter. It's indeed

a daring step though in the right direction. I would Print Both of them

on the ammo boxes to start the introduction. There's lots of folks that don't

even know what G7 is.