30-40 Krag Muzzle Velocity

The Muzzle Velocity of a 30-40 Krag is 2,200 feet per second.

.30-40 Krag

The .30-40 Krag is a centerfire rifle cartridge that was introduced in 1892 as the standard-issue round for the U.S. military. It was chambered in the Krag-Jørgensen rifle, which became the first bolt-action rifle adopted by the U.S. Army. The cartridge is historically significant as it marked the Army's transition from black powder to smokeless powder ammunition.

Key Characteristics of the .30-40 Krag:

• Caliber: .30-inch bullet diameter.
• Powder: Originally loaded with 40 grains of smokeless powder.
• Bullet Weight: Typically 220 grains.
• Muzzle Velocity: Approximately 2,000 feet per second (ft/s), depending on the load.
• Case: Rimmed bottleneck design, which facilitates extraction in bolt-action rifles.

Historical Use:

• The Krag rifle and its .30-40 Krag cartridge were used by the U.S. Army in the Spanish-American War (1898) and the Philippine-American War.
• Although the Krag rifle was praised for its smooth bolt action, it had disadvantages compared to Mauser-designed rifles of the same era, which offered better magazine systems and higher velocities.
• By 1903, the .30-40 Krag was replaced by the .30-03 and subsequently the .30-06 Springfield cartridge.

Firearm Calculators

• Sectional Density: Computes the factor used in the computation of the ballistic coefficient called sectional density.
• Bullet Ballistic Coefficient: Computes factor that represents a bullet's ability to overcome air resistance in flight.
• Ballistic Coefficient from Bullet's Mass, Diameter and Form Factor: Estimates the ballistic coefficient from the mass, diameter and form factor
• Miller Twist Rule: Computes the optimal barrel twist rate for stabilizing a bullet's flight given the bullet's diameter, length and mass.
• Taylor Knock-out Factor: Calculates a factor indicating the power of a round,.
• Greenhill Formula for Optimal Rifling Twist Rate: calculate the optimal barrel twist rate for stabilizing a bullet's flight given the bullet's diameter, length, specific gravity and velocity. 
• Bullet Flight Range: Computes the maximum range (horizontal distance) traveled by a bullet based on the muzzle velocity, elevation angle and shooter height.
• Muzzle Energy of a Projectile: Calculates the kinetic energy in a bullet immediately after leaving the barrel given the bullet's mass and velocity.
• Recoil Velocity of a Gun: Computes the velocity at which a gun will move in the opposite direction in relation to the projectile that it fired.
• Cost per Round: Computes cost per round of ammunition based on the cost of a container of cartridges and the number of rounds in the container.
• Rifle Sight Correction Angles: Computes the Minutes of Angle corrections for rifle sights.
• Shotgun Shell Reloading Cost: Computes the cost to reload used shotgun shells (hulls) with powder, shot, wads and primers.
• Shotgun Shell Loading Cost: Computes the cost to load new pre-primed shells (hulls) with power, shot and wads. 
• Metal Ball Weight: Computes the mass (weight) of a spherical metal (e.g., steel) ball based on the size (diameter).
• Metal Cylinder Weight: Computes the mass (weight) of a metal cylinder based on the size (diameter and length).