Why some calibers stay cheap
Three factors determine ammo cost:
Production volume. 9mm is cheap because billions of rounds are manufactured annually. Economies of scale drive down per-unit cost. Niche calibers like 10mm Auto or .300 Blackout cost more because production runs are smaller.
Material cost. Bigger bullets use more lead and copper. A .45 ACP 230gr FMJ uses roughly 3x the lead of a 9mm 115gr FMJ. Rifle cartridges use more powder. These raw material costs set a floor that no amount of competition can break through.
Import availability. Before the 2021 Russian import ban, 7.62x39 was one of the cheapest rifle calibers because Tula, Wolf, and Barnaul produced enormous volumes of steel-cased ammo. That supply is now constrained, and 7.62x39 prices have risen accordingly.
The cheapest way to shoot more
Beyond caliber choice, these strategies reduce your cost per range session:
Buy in bulk. A case of 1,000 rounds is almost always cheaper per round than individual boxes. Most retailers offer free shipping above $100–200, which eliminates the shipping cost that kills small orders.
Set price alerts. Ammo prices fluctuate daily. Set an alert on IronScout for your caliber and buy when prices dip below your target CPR. Patient buyers save 10–20% over impulse purchasers.
Don't panic buy. Election cycles, legislative threats, and supply chain disruptions cause panic buying that spikes prices 50–200%. The best strategy is maintaining a baseline supply so you're never forced to buy at peak prices.
Consider steel case for range use. Steel-cased ammo saves $0.03–0.10/rd depending on caliber. Over 1,000 rounds, that's $30–100. Read Steel Case vs Brass Case for the full tradeoff analysis.
Shoot .22 LR. Seriously. A .22 LR pistol or rifle costs $200–400 and ammunition costs a quarter of what 9mm costs. Many shooting skills (trigger control, sight alignment, follow-through) transfer directly. Supplement your centerfire practice with .22 and your annual ammo budget drops significantly.
Caliber cost by use case
If you're choosing a caliber for a new firearm and cost matters, here's the picture by use case:
Budget range shooting: .22 LR (nothing comes close)
Self-defense handgun on a budget: 9mm — cheapest centerfire handgun caliber, with the best selection of affordable defensive ammo
Budget AR-15 shooting: .223 Remington / 5.56 NATO — universal, high-volume, competitive pricing
Hunting (deer-class game): .308 Winchester — not cheap, but the widest selection of affordable hunting loads compared to 6.5 Creedmoor or .30-06
Shotgun sports / home defense: 12 Gauge birdshot for clay shooting ($0.25–0.35/rd) is one of the cheapest per-trigger-pull options for long guns
The bottom line
.22 LR is the cheapest caliber by a wide margin. Among centerfire handgun calibers, 9mm wins. Among centerfire rifle calibers, .223/5.56 wins. These rankings have been stable for decades and are unlikely to change because they're driven by production economics, not marketing.
The best way to save money on ammo isn't caliber optimization — it's buying discipline. Buy in bulk, buy on dips, don't panic buy, and supplement centerfire practice with .22 LR.
Compare prices across all calibers →
Related articles
Sources
- SAAMI Cartridge Standards — Caliber specifications
- .22 Long Rifle — Wikipedia — The cheapest cartridge
- 9×19mm Parabellum — Wikipedia — Most popular handgun caliber