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Steel-cased ammunition, predominantly manufactured in Russia, China, and Eastern European countries, offers significant cost savings over brass—typically 30-40% less per round. Modern steel cases use protective coatings (lacquer, polymer, or zinc plating) to prevent rust, but corrosion resistance remains inferior to brass. Steel's main drawback is its poor elasticity: unlike brass, steel doesn't expand to fully seal the chamber (relying instead on its stiffness), and it doesn't contract as cleanly for extraction. This can cause increased extractor wear over tens of thousands of rounds, though the effect is often overstated for casual shooters. Steel cases cannot be reloaded due to their material properties. While some shooters avoid steel-cased ammo in premium firearms, many AR-15 and AK owners use it extensively for affordable training. The magnetic steel body means many indoor ranges prohibit steel-cased ammunition.
| Material | Reloadable | Corrosion | Weight | Cost |
|---|---|---|---|---|
| Steel | No | Poor | +15-20% | $ |
| Brass | Yes (5-10x) | Very Good | Baseline | $$$ |
| Aluminum | No | Good | -65% | $$ |
| Nickel Brass | Limited | Excellent | Same as brass | $$$$ |
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