.300 Win Mag Ammo Prices & Cost Per Round
Real-time price tracking across 4 retailers. Updated every 2 hours.
Track .300 Win Mag ammo cost per round in real time across 4 retailers. We're monitoring 16 .300 Win Mag products (8 priced offers with CPR data) with box prices starting at $46.41. The typical cost per round is $3.37, with the best deal at $2.32/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: $3.37 across 8 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 | 274.8¢/rd | 130.5¢/rd | — |
| August 2026 | 274.8¢/rd | 127.7¢/rd | -2.2% |
| July 2026 | 281.0¢/rd | 60.0¢/rd | +1.9% |
| June 2026 | 275.7¢/rd | 60.0¢/rd | +0.3% |
| May 2026 | 275.0¢/rd | 75.0¢/rd | -1.4% |
| April 2026 | 279.0¢/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 $2.32/round. A typical CPR across 8 tracked offers is $3.37/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 $3.37. 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 4 retailers, the cheapest .300 Win Mag ammo starting at $46.41/box. We compare prices from Brownells, E-Commerce Arms, GrabAGun, Palmetto State Armory and more.
Other Calibers
All .300 Win Mag Ammo — Lowest CPR First
