.300 Win Mag Ammo Prices & Cost Per Round
1,096 listings tracked · 853 in stock, across 14 retailers. Retailer feeds are checked every 15 minutes.
85¢/rd
Lowest cost per round →
$2.75/rd
Median cost per round across in-stock listings
$16.99
Cheapest Box →
Brownells
BLACK HILLS AMMUNITION - BLACK HILLS GOLD 300 WIN MAG ELD-X POLYMER TIPPED RIFLE AMMO$31.99
Out of stock$1.60/rd · 20 rds
Shipping calculated in cart
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GrabAGun
Hornady American Whitetail 180 Grain InterLock Spire Point Brass .300 Win Mag 20Rds$32.69
Out of stock$1.64/rd · 20 rds
Shipping calculated in cart
GrabAGun
Sellier and Bellot eXergy Brass .300 Win 180 Grain 20-Rounds TAC-EX-Blue$33.29
Out of stock$1.67/rd · 20 rds
Shipping calculated in cart
GrabAGun
Winchester Deer Season XP Brass .300 Win Mag 20-Rounds$34.09
Out of stock$1.70/rd · 20 rds
Shipping calculated in cart
GrabAGun
Nosler Ballistic Tip Brass .300 Win Mag 150-Grain 20-Rounds BTS$36.69
Out of stock$1.83/rd · 20 rds
Shipping calculated in cart
Brownells · 2 offers
Browning Ammunition Long Range Pro 300 Winchester Magnum Ammo - 300 Winchester Magnum 195gr Tipped Matchking 20/Box$37.18
Out of stock$1.86/rd · 20 rds
Shipping calculated in cart
Brownells · 2 offers
Federal Non-Typical Whitetail Ammo 300 Winchester Mag 180gr Soft Point - 300 Winchester Magnum 180gr Soft Point 20/Box$37.99
Out of stock$1.90/rd · 20 rds
Shipping calculated in cart
Brownells
BERGER BULLETS - MATCH GRADE HUNTING 300 WINCHESTER MAGNUM AMMO$37.99
Out of stock$1.90/rd · 20 rds
Shipping calculated in cart
Brownells
HORNADY - AMERICAN WHITETAIL® 300 WIN MAG INTERLOCK® SP RIFLE AMMO$37.99
Out of stock$1.90/rd · 20 rds
Shipping calculated in cart
E-Commerce Arms · 3 offers
Ammo Inc Signature Hunt .300 Win Mag Rifle Ammo – 180 Grain | Super Shock Tip | 20rd Box - Flat Rate Shipping Under 30lbs!$39.80
Out of stock$1.99/rd · 20 rds
Shipping calculated in cart
Brownells · 2 offers
Federal Non-Typical Whitetail Ammo 300 Winchester Mag 150gr Soft Point - 300 Winchester Magnum 150gr Soft Point 20/Box$40.99
Out of stock$2.05/rd · 20 rds
Shipping calculated in cart
Brownells
HORNADY - AMERICAN WHITETAIL® 300 WIN MAG SST® POLYMR TIP RIFLE AMMO$41.99
Out of stock$2.10/rd · 20 rds
Shipping calculated in cart
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GrabAGun
Federal Fusion 300WIN 165GR 20rds$42.69
Out of stock$2.14/rd · 20 rds
Shipping calculated in cart
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GrabAGun
Federal Fusion 300WIN 165GR 20rds$42.69
Out of stock$2.14/rd · 20 rds
Shipping calculated in cart
Brownells
Norma Whitetail 300 Winchester Magnum Ammo - 300 Winchester Magnum 150gr Penetrating Soft Point 20/Box$43.99
Out of stock$2.20/rd · 20 rds
Shipping calculated in cart
Kentucky Gun Co · 3 offers
BROWNING AMMO 300 Win Mag Silver Series SP 180Gr 20rd$43.99
Out of stock$2.20/rd · 20 rds
$57.93 shipped · $13.94 shipping
GrabAGun
Winchester Deer Season XP Brass .300 Win Mag 20-Rounds$44.29
Out of stock$2.22/rd · 20 rds
Shipping calculated in cart
GrabAGun
Browning Max Point Brass .300 Win 180 Grain 20-Rounds$46.39
Out of stock$2.32/rd · 20 rds
Shipping calculated in cart
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GrabAGun
Federal Fusion 300WIN 180GR 20rds$46.89
Out of stock$2.34/rd · 20 rds
Shipping calculated in cart
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GrabAGun
Federal Fusion 300WIN 180GR 20rds$46.89
Out of stock$2.34/rd · 20 rds
Shipping calculated in cart
Brownells · 2 offers
Browning Ammunition Bxs 300 Winchester Magnum Ammo - 300 Win Mag Bxs Polymer Tip Solid Expansion 20/Box$46.99
Out of stock$2.35/rd · 20 rds
Shipping calculated in cart
Brownells
Sellier & Bellot 300 Winchester Magnum 180gr Pts Ammo - 300 Winchester Magnum 180gr Polymer Tip Special 20/Box$46.99
Out of stock$2.35/rd · 20 rds
Shipping calculated in cart
Brownells
FEDERAL - POWER-SHOK AMMO 300 WIN MAG 180GR SP$46.99
Out of stock$2.35/rd · 20 rds
Shipping calculated in cart
Brownells
BARNES BULLETS - BARNES VOR-TX 300 WINCHESTER MAGNUM AMMO$46.99
Out of stock$2.35/rd · 20 rds
Shipping calculated in cart
.300 Win Mag Cost Per Round History
.300 Win Mag Price by Month
| Month | Median cost per round | Lowest cost per round | Change |
|---|---|---|---|
| November 2026 | $2.72/rd | 75¢/rd | +3.9% |
| October 2026 | $2.62/rd | 75¢/rd | — |
| September 2026 | $2.62/rd | $1.15/rd | -0.8% |
| August 2026 | $2.64/rd | $1.07/rd | +1.7% |
| July 2026 | $2.60/rd | $1.07/rd | +1.6% |
| June 2026 | $2.56/rd | $1.07/rd | -1.6% |
| May 2026 | $2.60/rd | $1.15/rd | -5.5% |
| April 2026 | $2.75/rd | $1.50/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.
Price alert for .300 Win Mag
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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 $0.85/round. A typical CPR across 591 tracked offers is $2.75/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 $2.75. 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 tracking across 14 retailers, the cheapest .300 Win Mag ammo starting at $16.99/box. We compare prices from Ammunition Depot, BattleHawk Armory, Brownells, E-Commerce Arms and more.
Other Calibers
.17 HMR
.22 LR
.22 WMR
.243 Win
.270 Win
.300 Win Mag
.308 Winchester
.338 Lapua
.350 Legend
.357 Magnum
.38 Special
.380 ACP
.40 S&W
.410 Bore
.44 Magnum
.45
10mm
12 Gauge
20 Gauge
28 Gauge
30-06
300 Blackout
5.56 / .223
5.7x28mm
6.5 Grendel
6.5mm Creedmoor (6.5x48mm)
7.62x39
7.62x51 NATO
7mm Rem Mag
9mm
Compare .300 Win Mag ammo by cost per round. Open any product to see its full price history or set a price alert.