Ballistic Coefficient Chart By Caliber

A ballistic coefficient (BC) indicates a projectile’s ability to overcome atmospheric drag and retain its forward momentum during flight. By consulting a ballistic coefficient chart, shooters can effectively evaluate different ammunition options to determine which projectiles will minimize wind deflection and reduce bullet drop at extended ranges.

Ballistic Coefficient Chart

Caliber	Bullet Weight	Bullet Type	Manufacturer and Bullet Model	G1 Ballistic Coefficient	G7 Ballistic Coefficient	Drag Model or Source Notes
.22 LR	40 gr	Solid Lead Round Nose	CCI Standard Velocity	.120	Not verified	G1 published by manufacturer
.223 Remington	55 gr	Full Metal Jacket Boat Tail	Hornady FMJ-BT	.243	Not verified	G1 published by manufacturer
6.5 Creedmoor	143 gr	Polymer Tip Boat Tail	Hornady ELD-X	.625	.315	G1 and G7 published by manufacturer
7mm Rem Mag	180 gr	Very Low Drag Boat Tail	Berger VLD Hunting	.673	.344	G1 and G7 published by manufacturer
.308 Winchester	175 gr	Hollow Point Boat Tail	Sierra MatchKing	.505	.243	G1 velocity dependent, G7 published
9mm Luger	115 gr	Jacketed Hollow Point	Hornady XTP	.129	Not verified	G1 published by manufacturer
.45 ACP	230 gr	Full Metal Jacket	Winchester White Box	.194	Not verified	G1 published by manufacturer

Overview of Chart Data

• Verified G1 BC figures within this dataset span from a low of .120 for the .22 LR up to .673 for the 180-grain 7mm Berger projectile.
• Variations between bullets of identical calibers are significant, especially when contrasting short pistol rounds with elongated, streamlined rifle bullets.
• Heavier and longer profiles, such as the 180-grain 7mm VLD, yield substantially higher aerodynamic efficiencies compared to lighter, shorter projectiles like the 55-grain .223 option.
• For modern boat-tail rifle bullets, the published G1 figures are generally twice as high as their G7 counterparts.
• This chart highlights the necessity of evaluating individual bullets rather than grouping them by caliber, as the physical profile and mass determine the coefficient, not the barrel diameter.

Ballistic Coefficient Chart by Caliber

Caliber	Bullet Weight	Bullet Design	Manufacturer and Model	G1 BC	G7 BC
.22 LR	40 gr	Lead Round Nose	CCI Mini-Mag	.125	Not verified
.223 Rem / 5.56 NATO	77 gr	Hollow Point Boat Tail	Sierra MatchKing	.372	.190
.243 Winchester	95 gr	Polymer Tip Boat Tail	Hornady V-MAX	.365	Not verified
6.5 Creedmoor	140 gr	Polymer Tip Boat Tail	Hornady ELD Match	.646	.326
.270 Winchester	130 gr	Spire Point Flat Base	Nosler Partition	.416	Not verified
7mm Rem Mag	162 gr	Polymer Tip Boat Tail	Hornady ELD-X	.631	.318
.308 Winchester	168 gr	Hollow Point Boat Tail	Sierra MatchKing	.462	.218
.30-06 Springfield	180 gr	Soft Point Flat Base	Remington Core-Lokt	.383	Not verified
.300 Win Mag	210 gr	Very Low Drag Boat Tail	Berger VLD Target	.720	.369
9mm Luger	147 gr	Jacketed Hollow Point	Federal HST	.205	Not verified
.45 ACP	230 gr	Jacketed Hollow Point	Speer Gold Dot	.143	Not verified

Caliber and Projectile Trends

• Cartridges designed for long-range precision, such as the 6.5 Creedmoor and .300 Winchester Magnum, deliver the highest aerodynamic efficiency when loaded with heavy, sleek match projectiles.
• Handgun rounds uniformly exhibit G1 BC metrics well below .250, a direct result of their short and blunt geometry.
• In the .30 caliber category, a 168-grain boat-tail projectile boasts a higher BC than a heavier 180-grain flat-base bullet, demonstrating that aerodynamic geometry often outweighs raw mass.
• While elevated BC metrics translate to reduced wind drift downrange, they do not guarantee superior accuracy or greater kinetic energy transfer at close distances.

Bullet Ballistic Coefficient Chart by Bullet Type

Bullet Type	Caliber	Bullet Weight	Manufacturer and Model	G1 BC	G7 BC	Notes
Round Nose	.30-30 Win	170 gr	Hornady InterLock RN	.189	Not verified	Blunt profile generates substantial drag
Flat Base	.270 Win	130 gr	Sierra Pro-Hunter	.370	Not verified	Reliable hunting profile with moderate resistance
Boat Tail	.308 Win	165 gr	Nosler Ballistic Tip	.475	Not verified	Tapered rear section minimizes base drag
Hollow Point	9mm Luger	124 gr	Speer Gold Dot	.135	Not verified	Open nose cavity diminishes aerodynamics
Polymer Tip	6.5 CM	143 gr	Hornady ELD-X	.625	.315	Synthetic tip prevents in-flight deformation
Match	.300 Win Mag	230 gr	Berger Hybrid Target	.718	.368	Engineered specifically for maximum flight efficiency

Performance by Bullet Geometry

• Traditional round-nose shapes and expansive hollow points yield the lowest ballistic coefficients across all surveyed categories.
• Polymer-tipped variants and specialized match projectiles consistently register the highest aerodynamic efficiency.
• Upgrading from a standard flat base to a tapered boat-tail configuration dramatically boosts a rifle bullet’s BC by smoothing the turbulent airflow at the rear of the projectile.
• Because physical geometry dictates published BC figures, projectiles within the same broad design category can still exhibit widely varying flight characteristics.

What Is the Ballistic Coefficient?

A ballistic coefficient serves as a mathematical representation of how effortlessly a bullet navigates through the atmosphere relative to a standard drag model. An elevated number signifies that the projectile sheds velocity at a slower rate and resists environmental factors like crosswinds more efficiently.

• This metric assesses the relationship between a projectile’s sectional density and its aerodynamic form factor.
• Elongated, streamlined bullets carrying more weight relative to their diameter generally produce superior BC figures.
• Coefficients fluctuate wildly among bullets of identical calibers because a flat-nosed projectile encounters far more atmospheric resistance than a sharply pointed one of the exact same weight.
• The G1 standard represents a flat-based projectile featuring a moderately curved nose, whereas the G7 standard mirrors a modern boat-tail bullet with an elongated, pointed tip.
• Certain projectiles list varying BC metrics across different speed brackets because atmospheric drag characteristics shift significantly as the bullet drops from supersonic to subsonic velocities.
• A high BC cannot map out a complete flight path on its own, as starting velocity, ambient temperature, and barometric pressure are equally vital in calculating the exact point of impact.

How to Calculate Ballistic Coefficient

Determining a reliable ballistic coefficient goes beyond simply knowing the bullet’s diameter and weight. It demands precise data regarding the projectile’s behavior and velocity decay over a measured distance.

1. Factory-Provided Data: The most dependable approach involves referencing the specific coefficient supplied by the ammunition or bullet manufacturer, ensuring you identify whether the figure uses the G1 or G7 standard.
2. Live-Fire Measurement: You can calculate an estimated BC by recording the bullet’s exact speed at the muzzle and then capturing its speed again at a specific downrange interval, such as 100 yards. By comparing this measured velocity loss against the expected velocity loss of a standard reference projectile, you determine the bullet’s aerodynamic efficiency.

Capturing only the muzzle velocity provides no insight into drag. Producing a trustworthy BC demands multiple downrange data points aligned with a recognized mathematical standard.

To successfully estimate a ballistic coefficient, you must gather:

• Precise velocity at the muzzle.
• Precise remaining velocity at a known downrange distance.
• The exact distance separating the two chronographs.
• Environmental variables including ambient temperature, barometric pressure, and altitude.
• The specific reference drag profile utilized for the comparison.

G1 vs. G7 Ballistic Coefficient

Feature	G1 Ballistic Coefficient	G7 Ballistic Coefficient
Reference model	Modeled after a flat-based projectile with a blunt, curved nose	Modeled after a boat-tail projectile with an elongated, sharp tip
Common applications	Handgun ammunition, classic hunting rounds, shotgun slugs	Long-distance rifle ammunition, advanced precision projectiles
Bullet designs	Ideal for round-nose and flat-base geometries	Ideal for low-drag, tapered boat-tail geometries
Comparing published values	Metrics appear numerically higher and shift based on flight speed	Metrics appear numerically lower and remain consistent across speed ranges

Understanding the Drag Models

• G1 metrics will consistently present as a larger number than G7 metrics for the identical projectile.
• Relying on a G1 standard for an advanced boat-tail bullet usually requires calculating multiple BC values for different velocity bands to maintain precision.
• The G7 standard delivers a more uniform, single-number flight prediction for sleek rifle bullets across their entire trajectory.
• Shooters cannot directly swap or convert G1 numbers into G7 numbers without utilizing specialized ballistic calculators.

Factors That Affect Ballistic Coefficient

Bullet shape and aerodynamic design control how seamlessly the atmosphere flows over the metal. A pointed, streamlined tip generates a minimal shockwave compared to a blunt tip, drastically lowering frontal air resistance.

Bullet mass and diameter combine to establish sectional density. A heavier projectile of a given caliber possesses greater momentum to punch through the atmosphere, yielding a superior ballistic coefficient compared to a lighter projectile sharing the exact same exterior shape.

Boat-tail and nose design dictate the rearward aerodynamic profile. A tapered rear section shrinks the low-pressure pocket that trails the bullet during flight, which sharply minimizes total drag and elevates the overall efficiency rating.

Velocity-dependent changes in drag take place because the atmosphere interacts differently with objects moving faster than the speed of sound versus those moving slower. As a projectile decelerates, its drag curve shifts, meaning the functional ballistic coefficient alters mid-flight.

The selected G1 or G7 model directly dictates the final published metric. The BC is not a fixed physical dimension of the bullet; rather, it is a relative performance score measured against a theoretical standard.

Manufacturer measurement and reporting methods also introduce variables. Competing brands evaluate their projectiles under differing atmospheric standards, using various barrel twist rates and speed ranges, which results in minor discrepancies in published metrics for nearly identical bullet designs.

Frequently Asked Questions

What is the ballistic coefficient?

The ballistic coefficient is a standardized numerical rating that evaluates how well a projectile cuts through the atmosphere and maintains its speed compared to a theoretical reference bullet.

What is a ballistic coefficient chart?

A ballistic coefficient chart is an organized reference tool that displays the aerodynamic efficiency ratings of various projectiles, allowing shooters to easily contrast their downrange performance.

How do you read a ballistic coefficient chart by caliber?

You navigate the chart by finding your specific caliber, identifying the exact bullet weight and brand you plan to shoot, and examining the listed G1 or G7 metric to gauge its aerodynamic capability.

How do you calculate ballistic coefficient?

You derive it by tracking the projectile’s exact speed at the muzzle and again at a known distance downrange, then comparing that measured rate of deceleration against a standard mathematical drag model.

What is the difference between G1 and G7 ballistic coefficient?

The G1 rating relies on a flat-based reference projectile with a relatively blunt tip, whereas the G7 rating utilizes a highly aerodynamic boat-tail reference projectile with a sharp, elongated tip.

Does a higher ballistic coefficient mean better accuracy?

No, a higher metric simply indicates the projectile is superior at retaining velocity and bucking the wind; actual precision relies heavily on the shooter’s skill, barrel quality, and ammunition consistency.

Do heavier bullets always have a higher ballistic coefficient?

Not necessarily. While mass contributes to momentum, a lighter bullet engineered with an aggressive boat-tail and streamlined polymer tip will often outpace a heavier bullet with a blunt, flat-nosed profile.

Why do bullets of the same caliber have different BC values?

Variations occur because a bullet’s overall length, nose sharpness, and base taper influence atmospheric resistance just as heavily as the physical diameter of the round.

Where can you find a bullet’s ballistic coefficient?

Shooters can typically locate this data printed directly on factory ammunition boxes, published in the manufacturer’s technical specifications online, or detailed in comprehensive reloading manuals.

How does ballistic coefficient affect bullet trajectory?

A projectile boasting a high coefficient sheds its speed much slower, which translates to a flatter vertical trajectory and significantly less horizontal drift caused by crosswinds over long distances.