# Kyoto2.org

Tricks and tips for everyone

# What is the coefficient of drag of a bullet?

## What is the coefficient of drag of a bullet?

The Coefficient of Drag (C.D.) for a bullet is an aerodynamic factor that relates air drag to air density, cross-sectional area, velocity and mass. One way to view C.D. is as the “generic indicator” of drag for any bullet of the same shape.

What is a good ballistic coefficient for a bullet?

Sporting bullets have BC’s in the range 0.12 to slightly over 1.00, with high being the most aerodynamic, and low being the least. Very-low-drag bullets with BCs ≥ 1.10 can be designed and produced on special lathes using mono-metal rods.

### What is a good coefficient of drag?

Usually if a carmaker is bragging about it, it’s in the low region, somewhere between 0.26 and 0.22 – and the lower the number, the better. For reference, an aerodynamically-ideal teardrop shape has a coefficient of drag of around 0.04.

What is the most aerodynamic bullet?

The Scirocco II is highly aerodynamic and, I believe, the toughest of the streamlined game bullets. It comes with a polymer tip and a boattail, and derives its strength from an extra-thick pure-copper jacket that’s bonded to the lead core.

## What is G7 ballistic coefficient?

G7 is an updated equation and the better system of measuring a ballistic coefficient. It provides more accurate and reliable results when calculating trajectory using a ballistics program that allows for a G7 to be used.

Is a .31 drag coefficient good?

The average modern automobile achieves a drag coefficient of between 0.25 and 0.3. Sport utility vehicles (SUVs), with their typically boxy shapes, typically achieve a Cd=0.35–0.45.

### Is high drag coefficient good?

A low coefficient is conducive to high top speed and low fuel consumption, while a higher drag coefficient is generally found in cars searching for high cornering speeds influenced by downforce. It shows that a car’s coefficient of drag can be found by analysing the drag force acting on the car at a given speed.

What is G7 bullet coefficient?

## Why is a teardrop aerodynamic?

For speeds lower than the speed of sound, the most aerodynamically efficient shape is the teardrop. The teardrop has a rounded nose that tapers as it moves backward, forming a narrow, yet rounded tail, which gradually brings the air around the object back together instead of creating eddy currents.

Is G1 or G7 better?

The G1 shape looks like a flat-based bullet. The G7 shape is quite different, and better approximates the geometry of a modern long-range bullet. So, when choosing your drag model, G1 is preferrable for flat-based bullets, while G7 is ordinarily a “better fit” for longer, boat-tailed bullets.