.300 Win Mag Ammo Prices & Cost Per Round
Real-time price tracking across 2 retailers. Updated every 2 hours.
Track .300 Win Mag ammo cost per round in real time across 2 retailers. We're monitoring 6 .300 Win Mag products (3 priced offers with CPR data) with box prices starting at $54.37. Prices are updated every 2 hours. Click any product to see its full price history and set a price drop alert.
.300 Win Mag Cost Per Round History
.300 Win Mag Price by Month
| Month | Median CPR | Lowest CPR | Change |
|---|---|---|---|
| September 2026 | 270.0¢/rd | 130.5¢/rd | — |
| August 2026 | 270.0¢/rd | 127.7¢/rd | -2.4% |
| July 2026 | 276.5¢/rd | 60.0¢/rd | +1.4% |
| June 2026 | 272.7¢/rd | 60.0¢/rd | +1.0% |
| May 2026 | 270.0¢/rd | 75.0¢/rd | -1.8% |
| April 2026 | 275.0¢/rd | 150.0¢/rd | — |
Median and lowest observed cost per round per calendar month, from in-stock listings tracked across supported retailers.
Want the whole market instead of one caliber? The Ammo Price Index chains these monthly medians across a fixed 12-caliber basket into a single month-over-month benchmark.
Frequently Asked Questions
Where can I find the cheapest .300 Win Mag ammo?
Based on our real-time tracking across 2 retailers, the cheapest .300 Win Mag ammo starting at $54.37/box. We compare prices from E-Commerce Arms, Palmetto State Armory and more.
Other Calibers
All .300 Win Mag Ammo — Lowest CPR First
