The Ammo Bourse Index
Ammo prices,
as one number.
A weighted basket of 25 calibers, repriced every four hours from the lowest in-stock listing at five retailers. October 9, 2026 = 100.
Cite it as: The Ammo Bourse Index: 103.3 (October 10, 2026)
Today's reading · October 10, 2026
+3.27 vs yesterday
Basket: 38.4¢ per round, weighted
25 of 25 calibers priced
- Pistol
- 106.5
- Rifle
- 100.0
- Shotgun
- 100.0
- Rimfire
- 106.4
Index history
Since the base date.
Daily closes.
2026-10-09 to 2026-10-10.
What moved it
The 25 components.
Weight is the caliber's share of the basket.
"vs base" is its own index, base 100.
| Caliber | Weight | Lowest price | vs base | 1 day | 7 days | 30 days |
|---|---|---|---|---|---|---|
| 9mm Luger | 20% | 22.6¢ | 113.0 | +13.0% | — | — |
| 5.56x45mm | 12% | 43¢ | 100.0 | 0.0% | — | — |
| .223 Remington | 10% | 38.4¢ | 100.0 | 0.0% | — | — |
| .22 LR | 10% | 7¢ | 107.7 | +7.7% | — | — |
| .308 Winchester | 6% | 66¢ | 100.0 | 0.0% | — | — |
| 12 Gauge | 6% | 34¢ | 100.0 | 0.0% | — | — |
| .45 ACP | 5% | 38¢ | 100.0 | 0.0% | — | — |
| .40 S&W | 4% | 27.9¢ | 100.0 | 0.0% | — | — |
| .380 ACP | 4% | 31¢ | 100.0 | 0.0% | — | — |
| 7.62x39mm | 4% | 53¢ | 100.0 | 0.0% | — | — |
| .300 Blackout | 3% | 48.7¢ | 100.0 | 0.0% | — | — |
| .38 Special | 2% | 39.9¢ | 100.0 | 0.0% | — | — |
| .357 Magnum | 2% | 46¢ | 100.0 | 0.0% | — | — |
| 10mm Auto | 2% | 35.5¢ | 100.0 | 0.0% | — | — |
| 6.5 Creedmoor | 2% | 90¢ | 100.0 | 0.0% | — | — |
| .30-06 Springfield | 2% | 89¢ | 100.0 | 0.0% | — | — |
| .44 Magnum | 1% | 64¢ | 100.0 | 0.0% | — | — |
| .243 Winchester | 1% | 87.5¢ | 100.0 | 0.0% | — | — |
| .270 Winchester | 1% | $1.15 | 100.0 | 0.0% | — | — |
| .30-30 Winchester | 1% | $1.00 | 100.0 | 0.0% | — | — |
| .350 Legend | 1% | 65¢ | 100.0 | 0.0% | — | — |
| 20 Gauge | 1% | 35.2¢ | 100.0 | 0.0% | — | — |
| .410 Bore | 1% | 40¢ | 100.0 | 0.0% | — | — |
| .22 WMR | 1% | 20.8¢ | 100.0 | 0.0% | — | — |
| .17 HMR | 1% | 25¢ | 100.0 | 0.0% | — | — |
How it is built
One basket.
Same every day.
Every four hours we record the lowest in-stock price per round for 25 calibers across LuckyGunner, SGAmmo, TargetSports USA, True Shot and Freedom Munitions. The day's closing price for each caliber is its lowest tracked in-stock price at the last check of the day.
Each caliber's close is divided by its price on the base date, October 9, 2026. The 25 ratios are averaged using fixed weights that roughly follow US retail volume (9mm Luger is 20% of the basket, 5.56 is 12%, and so on), then scaled so the base date reads 100. A reading of 104 means the basket costs 4% more than it did on October 9, 2026. The family indexes use the same method on their own calibers.
Because it is a ratio, a caliber's dollar price does not move the index. Only its percentage change does. The "basket" figure is the plain weighted average price per round, for people who want cents rather than points. Full detail, including the weights, is on the methodology page. The raw series is available as JSON at api.ammobourse.com/api/index. You are welcome to quote the index with a link to this page.