.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 →
GrabAGun
Nosler Trophy Grade Long Range Brass .300 Win Mag 190-Grain 20-Rounds ABLR$76.69
Out of stock$3.83/rd · 20 rds
Shipping calculated in cart
GrabAGun
Nosler Trophy Grade Long Range Brass .300 Win Mag 190-Grain 20-Rounds ABLR$76.69
Out of stock$3.83/rd · 20 rds
Shipping calculated in cart
Kentucky Gun Co
BUFFALO BORE 300 Win Mag 200Gr Barnes TSX 2900FPS 20rd$82.99
Out of stock$4.15/rd · 20 rds
$96.93 shipped · $13.94 shipping
Kentucky Gun Co
BUFFALO BORE 300 Win Mag 168Gr Barnes TTSX 3200FPS 20rd$82.99
Out of stock$4.15/rd · 20 rds
$96.93 shipped · $13.94 shipping
MidwayUSA
Black Hills Gold 300 Winchester Magnum Ammo 180 Grain Barnes Triple-Shock X Solid Hollow Point Lead Free Case of 100 (5 Boxes of 20)$419.99
Out of stock$4.20/rd · 100 rds
Free shipping over $100
E-Commerce Arms · 3 offers
Swift Scirocco II Rifle Ammunition .300 Win Mag 180 gr BT 2919 fps 20/ct - Flat Rate Shipping Under 30lbs!$84.79
Out of stock$4.24/rd · 20 rds
Shipping calculated in cart
MidwayUSA
Choice 300 Winchester Magnum Ammo 200 Grain Hornady ELD-X Polymer Tip Box of 20$86.99
Out of stock$4.35/rd · 20 rds
$94.99 shipped · $8 shipping, free over $100
Brownells
Federal Power-Shok Copper Ammo 300 Win Magnum 180gr Copper Hollow Point - 300 Winchester Magnum 180gr Copper Hp 200/Case$529.99
Out of stock
Shipping calculated in cart
Brownells
Sig Sauer, Inc. Elite Hunting Ammo 300 Winchester Magnum 165gr Ht - 300 Winchester Magnum 165gr Ht 200/Case$560.99
Out of stock
Shipping calculated in cart
Brownells
Sig Sauer, Inc. Elite Match Grade Ammo 300 Win Mag 190gr Otm - 300 Winchester Magnum 190gr Open Tip Match 200/Case$509.99
Out of stock
Shipping calculated in cart
Brownells
Federal Terminal Ascent 300 Winchester Magnum Ammo - 300 Winchester Magnum 200gr Terminal Ascent 200/Case$603.99
Out of stock
Shipping calculated in cart
Brownells
Sig Sauer, Inc. Elite Hunter Tipped 300 Winchester Magnum Ammo - 300 Winchester Magnum 180gr Tipped 200/Case$530.99
Out of stock
Shipping calculated in cart
Brownells
Federal Swift Scirocco Ii 300 Winchester Magnum Ammo - 300 Winchester Magnum 180gr Scirocco Ii 200/Case$515.99
Out of stock
Shipping calculated in cart
Brownells
Black Hills Gold Ammo 300 Winchester Magnum 200gr Eld-X - Black Hills Gold 300 Winchester Magnum 200gr Eld-X 100/Case$336.88
Out of stock
Shipping calculated in cart
Brownells
Black Hills Gold Ammo 300 Winchester Magnum 180gr Accubond - 300 Winchester Magnum 180gr Accubond 100/Case$284.99
Out of stock
Shipping calculated in cart
Brownells
Browning Ammunition Long Range Pro Hunter 300 Win Mag Ammo - 300 Win Mag 180gr Sierra Tipped Gameking 200/Case$589.99
Out of stock
Shipping calculated in cart
Brownells
Black Hills Gold Ammo 300 Winchester Magnum 165gr Gmx - 300 Winchester Magnum 165gr Gmx 100/Case$284.99
Out of stock
Shipping calculated in cart
Brownells
Black Hills Ammunition 300 Winchester Magnum 190gr Match Hollow Point Ammo - 300 Winchester Magnum 190gr Match Hollow Point 500/Case$1,586.88
Out of stock
Shipping calculated in cart
Brownells
Black Hills Gold Ammo 300 Winchester Magnum 180gr Tsx - Black Hills Gold 300 Winchester Magnum 180gr Tsx Bt 100/Case$399.38
Out of stock
Shipping calculated in cart
Kentucky Gun Co
REMINGTON 300 WM HyperSonic Rifle Bonded 180Gr PSP 20rd$41.99
Out of stock
$55.93 shipped · $13.94 shipping
No image
GrabAGun
Buffalo Bore Ammunition 55B/20 300 Win Mag Tipped TSX BT 180 GR 20Box$79.99
Out of stock
Shipping calculated in cart
No image
GrabAGun
Buffalo Bore Ammunition 55B/20 300 Win Mag Tipped TSX BT 180 GR 20Box$79.99
Out of stock
Shipping calculated in cart
Brownells
HORNADY - SUPERFORMANCE® 300 WINCHESTER RIFLE MAGNUM AMMO$60.99
Out of stock
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.