.300 Win Mag Ammo Prices & Cost Per Round
Real-time price tracking across 5 retailers. Updated every 2 hours.
Track .300 Win Mag ammo cost per round in real time across 5 retailers. We're monitoring 43 .300 Win Mag products (21 priced offers with CPR data) with box prices starting at $29.62. The typical cost per round is $2.65, with the best deal at $1.40/round. Prices are updated every 2 hours. Click any product to see its full price history and set a price drop alert.
Median .300 Win Mag cost per round on September 24, 2026: $2.65 across 21 in-stock listings tracked by Firearm Data Lab.
.300 Win Mag Cost Per Round History
.300 Win Mag Price by Month
| Month | Median CPR | Lowest CPR | Change |
|---|---|---|---|
| September 2026 | 273.9¢/rd | 130.5¢/rd | -0.1% |
| August 2026 | 274.2¢/rd | 127.7¢/rd | -1.9% |
| July 2026 | 279.5¢/rd | 60.0¢/rd | +1.6% |
| June 2026 | 275.0¢/rd | 60.0¢/rd | — |
| May 2026 | 275.0¢/rd | 75.0¢/rd | — |
| 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
What is a good cost per round for .300 Win Mag?
The best cost per round we're currently tracking for .300 Win Mag is $1.40/round. A typical CPR across 21 tracked offers is $2.65/round. Prices vary by brand, grain weight, and retailer.
Is .300 Win Mag ammo cheap right now?
The typical cost per round for .300 Win Mag is $2.65. Check our CPR trend chart above to see if current prices are above or below the 30-day average. Set a price alert to get notified when prices drop.
Where can I find the cheapest .300 Win Mag ammo?
Based on our real-time tracking across 5 retailers, the cheapest .300 Win Mag ammo starting at $29.62/box. We compare prices from Bereli, E-Commerce Arms, GrabAGun, Palmetto State Armory and more.
Other Calibers
All .300 Win Mag Ammo — Lowest CPR First
