Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3, outdoor product specialist.
The 380 ACP brass from Starline ships as factory-new, unprimed cases drawn from 70/30 copper-zinc alloy and annealed between each draw stage for consistent metallurgy across production lots. Reloading the 380 ACP—a cartridge that runs 21,500 psi SAAMI maximum—demands dimensional precision on overall length and neck tension, where even a few thousandths affect feed reliability in blowback subcompacts. Starline has produced brass in Sedalia, Missouri for over 30 years, and their vertically drawn process delivers more reloads per case than commodity brass.
Load Profile
Each case is hand-inspected before bagging, ensuring uniform wall thickness and reliable primer pockets for consistent ignition in short-barrel platforms. The 380 ACP headspaces on the case mouth, so over-crimping or trimming below specification will cause feeding failures. Starline cases arrive ready for full-length sizing, chamfering, and small pistol primers. This is not loaded ammunition—you receive 100 new, unprimed cases in a bulk bag.
Dimensions & Fit
| Spec | Value |
|---|---|
| Cartridge | 380 ACP |
| Finish | Brass (70/30 Cu-Zn) |
| Condition | New |
| Primed | No |
| Primer size | Small Pistol |
| Quantity | 100 pieces (bulk bag) |
| Country of origin | United States |
| Manufacturer | Starline Brass |
Browse more calibers in the reloading brass category.
Safe Handling & Compliance
This product is an unprimed brass case—it is not loaded ammunition. Follow published load data from a reputable reloading manual. The 380 ACP headspaces on the case mouth; do not over-crimp or trim below specification.
- Review the 4 rules of firearms safety before handling any firearm or component.
- Check your state and local laws—some jurisdictions regulate reloading components.
- Store brass in a cool, dry location away from heat sources.
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