.380 ACP Once-Fired Brass for Reloading | .380 Auto /9mm Browning Short Brass for Sale

How We Process .380 ACP Brass

Our .380 ACP brass passes through multiple stages of sorting, cleaning, inspection, and quality control before being packaged for sale.

Incoming range brass is first processed through trommels to help remove rimfire cases, debris, steel cases, and other unwanted materials. It is then sorted by body diameter and rim diameter using roll-sorting equipment and by case height using specialized sorting equipment.

After mechanical sorting, the brass is hand-inspected to remove nickel-plated cases from standard-brass products, aluminum cases that may have passed through earlier sorting stages, cases of the wrong caliber, and cases showing visible damage or defects.

Washed & Polished brass is cleaned using our industrial wet-cleaning process. It is then dried and polished in heated corncob media to improve its appearance while helping protect the cases from tarnish during storage.

Nickel-plated products are separately sorted to remove standard brass, aluminum, steel, and other unwanted materials. Products identified as roll-sized receive the additional processing described in the individual product title and Short Description.

Every batch is hand-inspected to remove cases showing split mouths, severe corrosion, major physical damage, severely damaged rims, excessive discoloration, or other conditions that could affect reloadability.

Our Quality Standard

Once-fired brass is a previously used product, and every case has its own history. While no inspection process can identify every possible defect, our goal is to provide brass that we would be confident using ourselves.

Many inspection decisions rely on practical reloading experience rather than a simple checklist. If a case does not meet the quality standard we expect for our own reloading bench, we would rather remove it than ship it.

Regardless of where your brass is purchased, every reloader should thoroughly inspect every case before reloading. This is one of the most important steps in producing safe, reliable ammunition. While we work hard to identify and remove defective cases, once-fired brass is a previously used product and no inspection process can guarantee that every defect will be found. The final inspection should always be performed by the individual assembling the ammunition.

Most once-fired brass orders include approximately 2–3% additional brass. While this helps compensate for the occasional case that may not meet our quality standards or your individual expectations, it should never replace a careful inspection before loading.

For additional information about once-fired brass, inspection, primer crimps, flash holes, safety considerations, and our overpack policy, please visit our Brass Information page.

.380 ACP Quick Specifications

The following information provides a practical reference for commonly checked .380 ACP cartridge and case dimensions. Always consult current published reloading data and official standards before loading ammunition.

Bullet Diameter Variations

Commercial bullets intended for .380 ACP are commonly offered in .355" diameter. Bullet diameter should not be assumed solely from a cartridge name or general bullet-category description, because manufacturers may use different dimensional tolerances or offer visually similar bullets for other cartridges.

Customers should always verify the actual bullet diameter before purchasing or loading bullets. The bullet manufacturer's published specifications should be reviewed when selecting components, and the bullet must be appropriate for the firearm and published load data being used.

Official SAAMI Reference

For complete cartridge and chamber drawings, dimensional tolerances, and pressure standards, consult the official SAAMI specifications.

View Official SAAMI .380 Automatic Specifications

Preparing .380 ACP Brass for Reloading

Proper case preparation is one of the most important steps in producing safe, reliable, and consistent ammunition. Every case should be inspected before reloading, regardless of whether it is new or once-fired.

Small Pistol Primers

.380 ACP brass normally uses Small Pistol primers. Primer pockets should still be inspected before loading to confirm that they are clean, undamaged, and suitable for seating a new primer.

Some military, foreign, or specialty cases may contain primer-pocket crimps or other manufacturer-specific features. Primer-pocket condition should be confirmed by direct inspection rather than relying entirely on the headstamp.

Primer Pocket Crimps

Some .380 ACP cases may contain crimped primer pockets designed to help retain the primer. Before seating a new primer, these crimps typically must be removed by swaging or reaming. Primer crimps are a normal manufacturing feature and are not considered a defect.

Case Capacity and Powder Charges

.380 ACP has a relatively small case capacity. Small changes in powder charge, bullet seating depth, component selection, or cartridge overall length may significantly affect ammunition performance and pressure.

Reloaders should use only current published load data from reputable reloading manuals or component manufacturers. Powder charges should be carefully measured, and every charged case should be visually inspected before bullet seating to help identify an incorrect, missing, or duplicated charge.

Case Bulges and Chamber Support

Brass fired in different firearms may show varying degrees of expansion near the lower portion of the case. Conventional sizing dies may address normal dimensional changes during resizing, while more pronounced bulges may require additional processing.

Cases showing excessive bulging, unusual deformation, cracks, or evidence of structural damage should be removed rather than forced back into service.

Roll Sizing

Roll sizing is available on select calibers offered by US Reloading Supply. Unless specifically identified in the product title or Short Description, .380 ACP brass has not been roll sized. Roll sizing processes the case body and lower case area differently from conventional resizing and is commonly used by high-volume reloaders and commercial ammunition manufacturers.

Unless otherwise stated in the individual product title or Short Description, roll-sized brass has not necessarily been deprimed, full-length resized, or otherwise fully processed. Customers should review the specific product information before ordering.

Nickel-Plated Brass

Nickel-plated .380 ACP cases can generally be reloaded using the same equipment as standard brass cases. Many reloaders appreciate nickel plating for its corrosion resistance, ease of identification, and attractive appearance.

Nickel plating may become worn, cracked, or flaked after repeated use. Nickel-plated cases should therefore be inspected carefully, particularly around the case mouth, before each loading.

Case Length and Headspacing

.380 ACP headspaces on the case mouth. The case mouth must remain capable of properly locating the cartridge in the chamber, making case length, mouth condition, bullet seating, and crimp important considerations.

Like many straight-wall semi-automatic pistol cases, .380 ACP brass rarely requires trimming and may become slightly shorter through repeated firing and resizing. Cases should still be inspected and measured periodically to confirm that they remain within current published specifications.

Crimp Considerations

.380 ACP ammunition normally uses a taper crimp rather than the roll crimp commonly associated with many revolver cartridges. Excessive crimping may interfere with proper case-mouth headspacing. Reloaders should follow the instructions supplied with their dies and the current published data applicable to the components being used.

Cartridge Overall Length and Chamber Fit

Compact .380 ACP pistols may have relatively short magazines, feed paths, or chamber-throat dimensions. A cartridge that fits one firearm may not necessarily function identically in another.

Reloaders should follow the cartridge overall length specified by the published load data being used and confirm that finished ammunition chambers and feeds properly in the intended firearm. A cartridge case gauge may also be used as an additional inspection tool.

Mixed-Headstamp Brass

Our standard .380 ACP brass is sold as mixed headstamp unless otherwise specified. Many reloaders successfully use mixed-headstamp brass for training, recreational shooting, and general-purpose ammunition. Shooters seeking maximum consistency may choose to sort brass by manufacturer, lot, case weight, or other characteristics before loading.

For additional information about primer crimps, roll sizing, inspecting once-fired brass, and other case-preparation topics, please visit our Brass Information page.

About the .380 ACP Cartridge

The .380 Automatic Colt Pistol cartridge—commonly called the .380 ACP or .380 Auto—was developed by John M. Browning during the early twentieth century for use in compact, blowback-operated semi-automatic pistols.

The cartridge became widely used in Europe and the United States and remains closely associated with compact and subcompact handguns. Its relatively small cartridge dimensions allow firearm manufacturers to produce lightweight pistols designed for concealed carry, personal defense, recreational shooting, and training.

Although .380 ACP is smaller than 9mm Luger, factory .380 ACP ammunition is often comparatively expensive. Reloading once-fired brass allows shooters to reuse available cartridge cases while tailoring practice and training ammunition to their firearm and intended application.

Common Names

The following names are commonly associated with this cartridge:

• .380 ACP
• .380 Auto
• .380 Automatic
• .380 Automatic Colt Pistol
• 9mm Browning Short
• 9mm Short
• 9mm Kurz
• 9mm Corto
• 9x17mm

.380 ACP and .380 Auto generally refer to the same cartridge. SAAMI uses the standardized full name "380 Automatic" and the abbreviated name "380 Auto."

Common Firearms Chambered in .380 ACP

.380 ACP is used in a wide range of firearms, including:

• Compact and subcompact semi-automatic pistols
• Pocket pistols
• Blowback-operated pistols
• Locked-breech compact pistols
• Concealed-carry pistols
• Backup-duty pistols
• Recreational and training pistols

.380 ACP and 9mm Luger Are Not Interchangeable

.380 ACP and 9mm Luger use bullets of similar nominal diameter, but they are different cartridges with different case dimensions, case capacities, operating characteristics, and chamber specifications.

They are not interchangeable. Brass and loaded ammunition should always be positively identified before processing, loading, or use.

.380 ACP and Other 9mm-Named Cartridges

The various international names used for .380 ACP can sometimes cause confusion. Names such as 9mm Browning Short, 9mm Kurz, 9mm Corto, and 9x17mm generally refer to .380 ACP.

Those names should not be confused with 9mm Luger, 9mm Makarov, 9x18 Police, 9mm Browning Long, or other cartridges containing “9mm” in their names. Always verify the cartridge designation and case dimensions before loading.

Nickel-Plated Brass

Nickel-plated .380 ACP brass is available as a separate product option when inventory allows. Nickel-plated cases are valued by some reloaders for corrosion resistance, easier visual identification, and their bright appearance.

Steel and Aluminum Cases

Steel and aluminum cases are commonly encountered during the sorting of range brass. These materials are separated from standard reloadable brass and are not included unless an individual product is specifically identified as steel, aluminum, or another specialty case type.

For additional cartridge history, educational articles, and technical resources, visit our Reloading Knowledge Center as new content becomes available.

Frequently Asked Questions About .380 ACP Brass

Q: Is .380 ACP the same as .380 Auto?
A: Yes. ".380 ACP," ".380 Auto," and ".380 Automatic" are commonly used names for the same cartridge. SAAMI uses "380 Automatic" as the full standardized name and "380 Auto" as its abbreviation.

Q: Is 9mm Browning Short the same as .380 ACP?
A: Yes. 9mm Browning Short is another common name for .380 ACP. The cartridge may also be identified as 9mm Short, 9mm Kurz, 9mm Corto, or 9x17mm.

Q: Is .380 ACP the same as 9mm Luger?
A: No. Although the two cartridges use bullets of similar nominal diameter, their cases, chamber dimensions, overall lengths, and operating characteristics are different. They are not interchangeable.

Q: What primer size does .380 ACP use?
A: .380 ACP brass normally uses Small Pistol primers.

Q: Is this .380 ACP brass deprimed?
A: Deprimed status varies by individual product. Review the product title and Short Description before ordering.

Q: Is this brass Boxer primed?
A: Standard .380 ACP brass is generally Boxer primed unless the individual product title or description states otherwise.

Q: What bullet diameter does .380 ACP use?
A: Commercial bullets intended for .380 ACP are commonly offered in .355" diameter. Always verify the actual bullet diameter and manufacturer specifications before purchasing or loading components.

Q: Is this mixed-headstamp brass?
A: Yes. Our standard .380 ACP brass is sold as mixed headstamp unless the individual product title or description states otherwise.

Q: Is military or foreign brass included?
A: Depending on the product selected and the composition of the batch, military or foreign headstamps may be present. Some cases may contain crimped primer pockets or other manufacturer-specific features requiring additional preparation.

Q: What is a primer crimp?
A: A primer crimp is a manufacturing feature used to help retain the primer. It is not considered a defect, but it usually must be removed before seating a new primer.

Q: What is roll sizing?
A: Roll sizing processes the case body and lower case area differently from conventional resizing and may help address dimensional changes near the base. US Reloading Supply offers roll-sized brass for select calibers. Availability varies by cartridge, so review the individual product title and Short Description for current processing options.

Q: Is roll-sized brass fully processed?
A: No. Roll-sized brass has been cleaned and roll-sized only unless the individual product description specifically states otherwise. In most cases, the spent primer remains in place, the case has not been full-length resized, and any primer-pocket crimp has not been removed.

Q: What is the difference between Washed & Polished and Roll-Sized brass?
A: Washed & Polished brass has been cleaned but otherwise requires normal case preparation by the reloader. Roll-Sized brass has been cleaned and roll-sized but typically still requires depriming, full-length resizing, and primer-pocket preparation when applicable. Always review the individual product title and Short Description for the exact processing level.

Q: Can I reload nickel-plated .380 ACP brass?
A: Yes. Nickel-plated cases can generally be reloaded using the same procedures as standard brass cases, provided they pass inspection. Watch for cracking, flaking, or excessive wear around the case mouth.

Q: Does .380 ACP brass need to be trimmed?
A: .380 ACP brass rarely requires trimming and may become slightly shorter through repeated firing and resizing. Cases should still be inspected and measured periodically as part of normal case preparation.

Q: Does .380 ACP headspace on the case mouth?
A: Yes. Because the cartridge headspaces on the case mouth, case length, case-mouth condition, bullet seating, and taper crimp should be carefully controlled according to current published data.

Q: Why is cartridge overall length important in .380 ACP?
A: .380 ACP has a relatively small case capacity, and changes in bullet seating depth may affect internal case volume, feeding, and pressure. Always use the overall length specified by the published load data applicable to the exact components being used.

Q: How many times can .380 ACP brass be reloaded?
A: There is no fixed number. Case life depends on the firearm, load intensity, brass manufacturer, chamber dimensions, and condition of the individual case. Every case should be inspected before each loading and retired when it shows cracks, excessive deformation, a loose primer pocket, or other damage.

Q: Is this guaranteed to be fired only once?
A: Our .380 ACP brass is recovered primarily as range brass and sold as once-fired brass. Because recovered range brass may contain mixed manufacturers and individual case histories cannot always be independently verified, no specific headstamp can be guaranteed to have been fired exactly one time unless an individual product states otherwise.

Q: Is the brass ready to load when it arrives?
A: Processing varies by individual product. Cleaned brass may still require inspection, depriming, resizing, primer-pocket preparation, case gauging, and other normal case-preparation steps before loading. Review the product title and Short Description for the exact processing level.

Q: Why do you include extra brass?
A: Most once-fired brass orders include approximately 2–3% additional brass. Once-fired brass is a previously used product, and while we work hard to maintain high quality standards, no inspection process is perfect. We also recognize that every reloader's inspection standards and intended use may differ. Please see our Brass Information page for details regarding our overpack policy.

Q: Should I inspect every case before reloading?
A: Yes. Every case should be thoroughly inspected before loading, regardless of whether the brass is new, once-fired, or previously reloaded. The final inspection is always the responsibility of the individual assembling the ammunition.

Q: Where can I learn more about once-fired brass?
A: Visit our Brass Information page for additional information about inspection, primer crimps, flash holes, case preparation, safety, and our overpack policy.