45 Colt Ammo

What Is .45 Colt Ammo?

The .45 Colt, also known as the .45 Long Colt, is a rimmed, straight-walled revolver cartridge introduced in 1873 for the Colt Single Action Army revolver. More than 150 years after its introduction, 45 long colt ammo remains one of the most widely recognized revolver cartridges among American shooters.

45 Colt 250gr RNFP Cowboy Load

History of the 45 Colt Cartridge

Developed for Colt by the Union Metallic Cartridge Company (UMC), the .45 Colt became the standard U.S. military revolver cartridge shortly after its introduction. Early black powder loads typically propelled a 255-grain bullet at approximately 850-900 fps from service revolvers of the period, providing useful performance for military and frontier applications.

As firearms technology evolved, 45 colt ammo adapted to the smokeless powder era and remained in commercial production. Today, the cartridge remains popular in revolvers and lever-action rifles for hunting, target shooting, Cowboy Action Shooting, and recreational use.

Why Is It Called 45 Long Colt?

The term “45 Long Colt” originated as an informal distinction between the .45 Colt and the shorter .45 Schofield cartridge. SAAMI designation of this ammo is “.45 Colt.”, however, the terms “.45 Colt” and “45 Long Colt” are commonly used interchangeably throughout the shooting industry.

Steinel 45 Colt Ammunition Lineup

Steinel’s 45 colt ammo lineup spans everything from reduced-recoil cowboy loads to heavy hunting cartridges. Each load is built around a specific combination of bullet construction, weight, velocity, and intended firearm application.

– 45 Colt 200gr RNFP Cowboy Load: This light-recoiling 45 colt cowboy load is designed for Cowboy Action Shooting, recreational shooting, and historical revolvers. Its moderate velocity helps reduce recoil and supports enjoyable shooting in appropriately chambered revolvers and lever-action rifles.

– 45 Colt +P 240gr XTP Mag Hunting Ammo: Intended for modern firearms rated for +P 45 Colt ammunition, this load utilizes the Hornady XTP Mag projectile to provide controlled expansion and substantial penetration on medium-sized game.

– 45 Colt 315gr Hard Cast RNFP – Ruger Only: This heavy hard-cast load is intended for Ruger-only platforms and other firearms specifically rated for comparable high-pressure 45 Colt ammunition. The heavy bullet is designed to maximize straight-line penetration on large and tough-bodied game.

– 45 Colt 350gr Hard Cast LFNGC – Ruger Only: Featuring a Long Flat Nose Gas Check design, this specialized hunting load is intended to deliver exceptionally deep straight-line penetration in applications where bullet integrity and penetration are priorities.

Important: Ruger-only loads are intended exclusively for firearms specifically rated for these pressure levels. They should not be used in Colt Single Action Army revolvers, replicas, or other firearms not approved for high-pressure 45 Colt ammunition.

Choosing the Right 45 Colt Ammo

The right 45 long colt ammo depends on the intended application, desired performance characteristics, and the firearm platform being used.

• Cowboy Action Shooting: A mild 45 colt cowboy load can help manage recoil during repeated stages while maintaining consistent operation. Steinel’s 200gr RNFP Cowboy Load is listed at 550 fps from a 4.3-inch barrel and is well suited for this application.
• Target & Recreational Shooting: For informal range use and skill development, moderate-recoil ammunition often provides a more comfortable shooting experience. Steinel’s 200gr RNFP Cowboy Load offers the lowest listed velocity in the current lineup, helping reduce shooter fatigue during extended sessions.
• Hunting: Hunting ammunition should be selected according to the game pursued, firearm capability, bullet construction, and local regulations. Steinel’s 240gr XTP Mag Hunting Ammo uses an expanding projectile designed to balance penetration and expansion for medium-game hunting.
• Metallic Silhouette Shooting: The .45 Colt has long been used in metallic silhouette competition due to its availability in accurate revolver platforms and broad range of bullet weights. Ammunition selection should prioritize accuracy, consistency, and reliable target engagement.
• Big-Bore & Heavy-Bullet Shooting: Shooters seeking maximum bullet weight and penetration may consider Steinel’s 315gr Hard Cast RNFP or 350gr Hard Cast LFNGC loads. These Ruger-only loads are intended exclusively for firearms specifically rated for high-pressure .45 Colt ammunition.

A Cowboy Action Shooting shooter engages a target with his lever-action rifle. To the left, the range officer with a timer measures the shooter’s stage time.
Source – Wikipedia

45 Colt Ammo for Sale

Browse Steinel’s complete selection of 45 colt ammo for sale, including cowboy loads, hunting ammunition, and heavy hard-cast options for modern revolvers and lever-action rifles. Whether you need 45 long colt ammo for Cowboy Action Shooting, 45 colt +P ammo for hunting, or dependable cartridges for recreational range use, Steinel offers carefully engineered loads tailored to specific shooting applications and firearm platforms.

Choosing Between Standard and +P Loads

Selecting between standard-pressure and +P 45 Colt ammunition requires consideration of firearm strength, intended application, and manufacturer recommendations.

• Pressure and Performance: Standard .45 Colt ammunition is loaded within SAAMI’s maximum average pressure limit of 14,000 PSI. +P loads operate at higher pressure levels and generally produce greater velocity and muzzle energy.
• Firearm Compatibility: Standard-pressure loads are suitable for the broadest range of firearms chambered in .45 Colt. +P ammunition should only be used in firearms specifically rated by the manufacturer for higher-pressure cartridges.
• Intended Application: Standard loads are commonly used for recreational shooting, Cowboy Action competition, and vintage-style revolvers. +P loads are often selected for hunting and field applications where increased energy and penetration may be beneficial.
• Safety Considerations: SAAMI does not publish a separate pressure standard for .45 Colt +P ammunition, and pressure levels may vary among manufacturers. Always verify firearm manufacturer ratings and ammunition specifications before using any +P .45 Colt load.

45 Colt Ammo Ballistics & Performance Overview

Understanding 45 long colt ammo ballistics requires considering more than muzzle velocity. Bullet weight, velocity, bullet construction, barrel length, and firearm configuration all influence downrange performance.

• Performance Overview: Steinel’s listed 45 colt ammo spans a wide performance range. The 200-grain RNFP Cowboy Load is listed at 550 fps, while the 315-grain Hard Cast RNFP load reaches 1,305 fps from a 7.5-inch barrel, illustrating the cartridge’s versatility across recreational shooting and hunting applications.
• Bullet Weight Considerations: Bullet weight affects velocity, recoil characteristics, momentum, and muzzle energy. Steinel’s lineup ranges from 200 to 350 grains.
  • 200-grain loads are commonly used in Cowboy Action Shooting and can offer reduced recoil when loaded to lower velocities.
  • 240-grain bullets provide a balanced combination of velocity, expansion, and hunting capability.
  • 315- to 350-grain bullets are often selected when deep penetration and momentum are priorities.
• Velocity, Energy & Ballistic Data: The following ballistic data illustrates the performance range of Steinel 45 Colt ammo across cowboy, hunting, and heavy hard-cast applications. Velocity figures were recorded from the barrel lengths specified for each load, and muzzle energy values were calculated using the standard kinetic energy formula: E = (bullet weight × velocity²) ÷ 450,400, where bullet weight is expressed in grains and velocity in feet per second.

Note: Actual velocity and energy may vary based on firearm, environmental conditions, and lot variations.

• Penetration: Penetration is influenced by bullet construction, velocity, sectional density, and target characteristics. Hard-cast bullets generally penetrate deeper than expanding bullets of similar weight because they retain their shape and frontal area more consistently.
• Effective Range: Most .45 Colt hunting applications occur within 100 yards. Practical effective range depends on firearm accuracy, shooter skill, bullet trajectory, and terminal performance requirements.
• Safety note: Never assume that a load is safe because the cartridge dimensions fit the chamber. Firearm strength, cylinder design, and manufacturer pressure ratings can vary significantly among firearms chambered for .45 Colt. Ruger-only loads and certain 45 colt +P ammo offerings should only be used in firearms specifically rated by the manufacturer for such ammunition. Never assume compatibility based solely on chambering designation.

Firearm Compatibility:

Firearms chambered for 45 long colt ammo include a wide variety of revolvers and lever-action rifles, including:

• Colt Single Action Army and reproductions
• Ruger Blackhawk
• Ruger Redhawk
• Henry lever-action rifles
• Marlin lever-action rifles
• Winchester lever-action rifles

US Colt Single Action 1873 Cavalry Model
Source-Wikipedia

Why Choose Steinel 45 Colt Ammo?

Steinel Ammunition Co. produces 45 long colt ammo with carefully selected components and attention to manufacturing consistency.

• Premium Components: Steinel uses quality bullets, brass cases, primers, and propellants selected for each load.
• Consistent Loading: Controlled loading processes help maintain consistent ammunition performance from round to round.
• Quality Control: Each production process includes quality checks designed to support reliable and consistent ammunition.
• Purpose-Built Loads: Steinel offers 45 colt ammo for cowboy shooting, hunting, recreational use, and specialized applications.
• Clear Load Specifications: Product information identifies bullet weight, construction, velocity, and applicable firearm restrictions.
• American Manufacturing: Steinel manufactures its ammunition in the United States with a focus on quality and consistency.

Frequently Asked Questions

Q1. Is .45 Colt the same as .45 Long Colt?
A. Yes. “.45 Long Colt” is a commonly used informal name for the cartridge officially designated by SAAMI as .45 Colt.

Q2. What is the best .45 Colt ammo for hunting?
A. The most appropriate hunting load depends on game size, firearm strength, bullet construction, and hunting conditions. Many hunters select expanding bullets such as the 240gr XTP Mag for medium game, while heavy hard-cast loads are often chosen when deeper penetration is desired.

Q3. Can I shoot .45 Colt in a lever-action rifle?
A. Yes. Many Henry, Marlin, Winchester, and other lever-action rifles are chambered for .45 Colt ammunition. Always verify the chamber marking and manufacturer specifications before use.

Q4. What is the difference between standard and +P .45 Colt ammo?
A. Standard .45 Colt ammunition operates within SAAMI’s maximum average pressure limit of 14,000 PSI. +P loads operate at higher pressure levels and should only be used in firearms specifically rated by the manufacturer for such ammunition.

Q5. What bullet weight is best for Cowboy Action Shooting?
A. Many Cowboy Action shooters favor lighter bullets, including 200-grain RNFP loads, because they typically produce lower recoil.

Q6. Can every revolver shoot +P .45 Colt ammunition?
A. No. Many revolvers chambered for .45 Colt are not designed for higher-pressure loads. Always verify manufacturer recommendations before use.

Q7. Is .45 Long Colt suitable for self-defense?
A. Some shooters choose .45 Colt for defensive purposes, particularly in modern revolvers designed for personal protection. Ammunition selection should be based on firearm compatibility, reliability, and the intended application.

Q8. What is the effective range of .45 Colt ammunition?
A. Effective range varies by load, firearm, shooter skill, and intended application. Most .45 Colt hunting and defensive uses occur at relatively short distances, often inside 100 yards.