.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 Gold Ammo 300 Winchester Magnum 165gr Gmx - 300 Winchester Magnum 165gr Gmx 20/Box$56.99
Out of stock$2.85/rd · 20 rds
Shipping calculated in cart
Brownells
Black Hills Gold Ammo 300 Winchester Magnum 180gr Accubond - 300 Winchester Magnum 180gr Accubond 20/Box$56.99
Out of stock$2.85/rd · 20 rds
Shipping calculated in cart
Kentucky Gun Co · 4 offers
BROWNING AMMO 300 Win Mag LRPH 180Gr 20rd$56.99
Out of stock$2.85/rd · 20 rds
$70.93 shipped · $13.94 shipping
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GrabAGun
HSM/Hunting Shack Game King 300 Win Mag 200 GR SBT 20 Bx/ 20 Cs$56.99
Out of stock$2.85/rd · 20 rds
Shipping calculated in cart
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GrabAGun
HSM/Hunting Shack Game King 300 Win Mag 200 GR SBT 20 Bx/ 20 Cs$56.99
Out of stock$2.85/rd · 20 rds
Shipping calculated in cart
Brownells · 2 offers
Federal Vital-Shok Ammo 300 Win Mag 180gr Nosler Partition - 300 Winchester Magnum 180gr Nosler Partition 20/Box$57.99
Out of stock$2.90/rd · 20 rds
Shipping calculated in cart
Brownells
HORNADY - PRECISION HUNTER 300 WINCHESTER MAG ELD-X POLYMER TIP RIFLE AMMO$57.99
Out of stock$2.90/rd · 20 rds
Shipping calculated in cart
Brownells
HORNADY - MATCH™ 300 WINCHESTER MAGNUM ELD MATCH POLYMER TIPPED RIFLE AMMO$57.99
Out of stock$2.90/rd · 20 rds
Shipping calculated in cart
Brownells
HORNADY - OUTFITTER 300 WINCHESTER MAGNUM RIFLE AMMO$59.99
Out of stock$3.00/rd · 20 rds
Shipping calculated in cart
GrabAGun
HSM/Hunting Shack Trophy Gold Brass .300 Win Mag 168-Grain 20-Rounds Match Hunting Very Low Drag$60.69
Out of stock$3.03/rd · 20 rds
Shipping calculated in cart
GrabAGun
HSM/Hunting Shack Trophy Gold Brass .300 Win Mag 168-Grain 20-Rounds Match Hunting Very Low Drag$60.69
Out of stock$3.03/rd · 20 rds
Shipping calculated in cart
MidwayUSA
HSM Tipping Point 300 Winchester Magnum Ammo 180 Grain Sierra GameChanger Polymer Tip Box of 20$60.99
Out of stock$3.05/rd · 20 rds
$68.99 shipped · $8 shipping, free over $100
Primary Arms · 2 offers
Federal Premium 300 Win Mag 200gr Barnes LRX Ammo - Box of 20$64.99
Out of stock$3.25/rd · 20 rds
Shipping calculated in cart
Kentucky Gun Co
VELO AMMUNITION Custom Big Game Ammunitions 300 Win 168Gr Ballistic Tip Solid Copper 20rd$66.82
Out of stock$3.34/rd · 20 rds
$80.76 shipped · $13.94 shipping
MidwayUSA
Federal Premium Terminal Ascent 300 Winchester Magnum Ammo 200 Grain Bonded Polymer Tip Case of 200 (10 Boxes of 20)$669.99
Out of stock$3.35/rd · 200 rds
Free shipping over $100
Brownells
Federal Premium 300 Winchester Magnum Ammo - 300 Winchester Magnum 215gr Hybrid 20/Box$67.99
Out of stock$3.40/rd · 20 rds
Shipping calculated in cart
GrabAGun
Berger 300 Win Mag 215 Grain Hybrid Target 20 Round Box$67.99
Out of stock$3.40/rd · 20 rds
Shipping calculated in cart
GrabAGun
Berger 300 Win Mag 215 Grain Hybrid Target 20 Round Box$67.99
Out of stock$3.40/rd · 20 rds
Shipping calculated in cart
Brownells
Black Hills Gold Ammo 300 Winchester Magnum 200gr Eld-X - Black Hills Gold 300 Winchester Magnum 200gr Eld-X 20/Box$69.00
Out of stock$3.45/rd · 20 rds
Shipping calculated in cart
GrabAGun
Berger 300 Win Mag 168 Grain Classic Hunter 20 Round Box$69.49
Out of stock$3.47/rd · 20 rds
Shipping calculated in cart
GrabAGun
Berger 300 Win Mag 168 Grain Classic Hunter 20 Round Box$69.49
Out of stock$3.47/rd · 20 rds
Shipping calculated in cart
Brownells
Sierra Bullets Gamechanger 300 Winchester Magnum Ammo - 300 Winchester Magnum 180gr Tipped Gameking 20/Box$69.99
Out of stock$3.50/rd · 20 rds
Shipping calculated in cart
Kentucky Gun Co
BUFFALO BORE 300 Win Mag 150Gr SPTZ (3350FPS/ME 3737 ft) 20rd$69.99
Out of stock$3.50/rd · 20 rds
$83.93 shipped · $13.94 shipping
Brownells
BARNES BULLETS - BARNES PRECISION MATCH 300 WINCHESTER MAGNUM AMMO$70.99
Out of stock$3.55/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.