You are here: Home > Ammunition > Cowboy Action Ammunition
Since 2009, Bishop Ammunition Manufacturing, LLC., has manufactured its Cowboy Ammunition to exacting standards. Using only US made components, the cleanest burning powder to replicate black powder loadings, we bring to our customers full quality control over every stage of the manufacturing process as well as the final product.

Bishop Ammunition Manufacturing, LLC.'s, goal is to market the best cowboy action ammunition in the industry. Each cartridge is assembled using the highest quality components for absolute reliability. Developed specifically for Cowboy Action Shooting competition, Bishop Ammunition Manufacturing, LLC., Cowboy Action pistol ammunition features flat nose lead bullets that are manufactured by X-Treme Bullets, to assure accuracy and knockdown power for steel plate competition. Cowboy Action Ammunition from Bishop Ammunition Manufacturing, LLC., use only the highest quality components and are manufactured to exacting standards to comply with the rules and requirements of cowboy action shooting. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Cowboy action shooting, CAS, is also known as western action shooting, single action shooting, or cowboy 3-gun. This is a competitive shooting sport that is now practiced in many places throughout the World. There are multiple sanctioning organizations including but not limited to:
- Single Action Shooting Society (SASS),
- Western Action Shootists Association (WASA), and
- National Congress of Old West Shooters (NCOWS), as well as others in the United States as well as other countries.

Cowboy action shooting is a type of 3 gun match utilizing a combination of pistol or pistols, rifle, and/or shotgun in a varying "old west themed" courses. Matches are scored for time and accuracy. It is required that all participants dress in appropriate theme or era "costume", and their gear and accessories must be period correct and are mandated by sanctioning group rules. CAS competitors must use firearms typical of the mid-to-late 19th century:
- single-action revolvers,
- lever-action rifles chambered in pistol calibers, and
- side-by-side double-barreled shotguns, commonly called Coach Guns

Rules also allow Winchester 1887 lever-action shotguns and Colt Lightning slide-action rifles to be used in competition. Cowboy action shooters may use original or reproduction guns, however all handguns must be "single-action".

The standard for ammunition used in all smokeless categories in all SASS, must have a power of at least 60 and no velocity may be less than 400 fps. The maximum velocity for revolvers is 1000 fps. The maximum velocity for rifles is 1400 fps. Of interesting note is that pocket pistols, derringers, and long-range rifles are exempt from the power factor and velocity requirements. To calculate a power factor, multiply the bullet weight times the velocity and then the resulting number is divided by 1000. For example, a 250 gr bullet traveling at 710 fps has a power factor of 177.5 (250x710)/1000=177.5 Shooters have to be concerned about "bounce back", "splash" and damage caused to a target or injury to personnel due to inappropriate ammunition. This is a major safety violation is grounds instant disqualification and ejection from a match. Additionally, revolver and rifle ammunition may not be jacketed, semi-jacketed, plated, gas checked, or copper washed. ALL cowboy ammunition must be lead, however, molydisulfide, polymer coated bullets are acceptable. All revolver and rifle ammunition must be of single projectile design. The ammunition cannot be recessed below the case mouth. Propellants containing nitrocellulose are prohibited as black powder substitutes. Any combination of smokeless and black powder, called duplex loads, are not only inherently unsafe, are specifically prohibited in ANY category.
Sort By:
Page of 1
Starline 45 Colt brass cases. NEW 38-55 Cowboy Action Ammunition  250g RNFP - Made in the U.S.A. with U.S. Components. Per 20
DUE TO HIGH DEMAND, WE HAVE RUN OUT OF THIS ITEM ONCE AGAIN. NOTE: These brass cases are shipped USPS Priority Flat Rate and has a fixed
shipping charge and will be shipped separately of any ammunition
ordered, all of which ships via UPS Ground.

Originally designed for use with blackpowder, the .45 Colt is one of the most powerful, commonly available handgun cartridges when loaded with smokeless powder.  Starline's .45 Colt brass has been tested to .44 Magnum pressures in gun systems suitable for such loads. All brass is produced within SAAMI specifications and includes special heat treat processes and designs to enhance strength and longevity.  BRAND NEW BRASS! Also available in 250 and 500 case lots.
Bishop Ammunition New Manufactured Cowboy Action Loaded 45 Colt cartridges are made in the U.S.A at our plant in North Highlands, California by U.S. Citizens. All components used in this cartridge are sourced to companies in the U.S.A. This cartridge is loaded on commercial-grade presses, and each cartridge is personally hand inspected and hand packed in the box.
  • Each box contains 50 cartridges using brand new Starline Brass, swaged hardcast bullets and American made primers.
  • Match-Grade
  • Top Quality, Position and Temperature Insensitive Powder
  • 1/10th Grain Consistency = Increased Accuracy = Better Performance.
  • All cartridges are packed in standard trays.

  • Power Factor: 160
  • Velocity: 800 fps
Bishop Ammunition New Manufactured Cowboy Action Loaded 38-55 cartridges are made in the U.S.A at our plant in North Highlands, California. All components used in this cartridge are sourced to companies in the U.S.A. This cartridge is loaded on commercial-grade presses, and each cartridge is personally hand inspected and hand packed in the box. CANNOT BE USED FOR HUNTING IN CALIFORNIA.

  • Each box contains 20 cartridges using brand new Starline Brass.
  • Match-Grade
  • Top Quality, Position and Temperature Insensative Powder
  • 1/10th Grain Consistency = Increased Accuracy = Better Performance.
  • All cartridges are packed in standard trays.
  • Each box will contain all new Starline brass cases
  • Muzzle velocity approximately 1250fps.
The 38-55 is not an obsolete cartridge. Several manufacturers still offer the 38-55 in their rifles, both single shot and lever action. The 38-55 is also still considered the preferred thin skin game taking cartridge there is. Millions of rifles have been chambered in this cartridge and loaded properly is effective on brown and black bear.

By purchasing this product, you certify that you are at least 21 years of age and you are legally allowed by your local, state and/or federal laws to posses and/or purchase / receive this item.
Starline 45 Colt brass cases. Starline 45 Colt brass cases.
Bishop Ammunition New Manufactured Cowboy Action Loaded 45 Colt cartridges are made in the U.S.A at our plant in North Highlands, California by U.S. Citizens. All components used in this cartridge are sourced to companies in the U.S.A. This cartridge is loaded on commercial-grade presses, and each cartridge is personally hand inspected and hand packed in the box.
CANNOT BE USED FOR HUNTING IN CALIFORNIA.

  • Each box contains 50 cartridges using brand new Starline Brass, swaged hardcast bullets and American made primers.
  • Match-Grade
  • Top Quality, Position and Temperature Insensitive Powder
  • 1/10th Grain Consistency = Increased Accuracy = Better Performance.
  • All cartridges are packed in standard trays.

  • Power Factor: 150
  • Velocity: 710 fps


Please see our updated return policy concerning ammunition returns. MUST BE 21 OR OVER TO PURCHASE.

By purchasing this product, you certify that you are at least 21 years of age and you are legally allowed by your local, state and/or federal laws to posses and/or purchase / receive this item.
DUE TO HIGH DEMAND, WE HAVE RUN OUT OF THIS ITEM ONCE AGAIN. NOTE: These brass cases are shipped USPS Priority Flat Rate and has a fixed
shipping charge and will be shipped separately of any ammunition
ordered, all of which ships via UPS Ground.



Originally designed for use with blackpowder, the .45 Colt is one of the most powerful, commonly available handgun cartridges when loaded with smokeless powder.  Starline's .45 Colt brass has been tested to .44 Magnum pressures in gun systems suitable for such loads. All brass is produced within SAAMI specifications and includes special heat treat processes and designs to enhance strength and longevity.  BRAND NEW BRASS! Also available in 100 and 500 case lots.
OUT OF STOCK. NOTE: These brass cases are shipped USPS Priority Flat Rate and has a fixed
shipping charge and will be shipped separately of any ammunition
ordered, all of which ships via UPS Ground.


Originally designed for use with blackpowder, the .45 Colt is one of the most powerful, commonly available handgun cartridges when loaded with smokeless powder.  Starline's .45 Colt brass has been tested to .44 Magnum pressures in gun systems suitable for such loads. All brass is produced within SAAMI specifications and includes special heat treat processes and designs to enhance strength and longevity.  BRAND NEW BRASS! Also available in 100 and 250 case lots.