Drag Models Commonly used for Small Arms Ballistics:

G1.1 = Standard Model. Flat Based with 2 caliber, (blunt) nose ogive.

G5.1 = For Moderate (Low Base) Boat Tails – 7°, 30’ Tail Taper with a 6.19 caliber tangent nose ogive.

G6.1 = For Flat Based Spire Point type bullets – 6.09 caliber secant nose ogive.

G7.1 = For VLD type Boat Tail type bullets – Long 7°, 30’ Tail Taper with 10 caliber secant nose ogive.

GS = For Round Ball – Based on Measured 9/16” Spherical Projectiles.

RA4 = For .22 Long Rifle. Identical to G1 at below 1,400FPS.

GL = Traditional Model used for Blunt Nose exposed Lead Bullets. Identical to G1 at below 1,400FPS.


G1 = Converted from the original Ingalls Tables. G1 projectiles are Flat Base Bullets with 2 caliber nose ogive and are the most common type of bullet.

Found here....https://kestrelmeters.com/pages/g1-g7-ballistic-coefficients-what-s-the-difference
 
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Could some one educate me in the configuration of drag function. How do I know which does or goes with what?
It's pretty confusing at first look.
Start on the main page by updating the information under the weather.
Set pellet type, FPS, ect. The biggest thing I had a problem with was setting my zero correctly. Some of the pages aren't very self explanatory but you get used to them.
Then click the circle x to go back to the main page.
On the main page if you are looking for just a single distance. Input all your variables then click calculate. They will show below the calculate button.
If you are looking for all the correction information for many distances ie. 10 to 100 click the bottom right top button that looks like an excel document. All the pages can be exported / emailed. Note the data is sent out semicolon delimited.
Hope this helps