.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 →
Target Sports USA
Prvi Partizan 300 Winchester Magnum Ammo 180 Grain Soft Point - PP3003$32.99
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Target Sports USA
Barnes VOR-TX 300 Winchester Magnum Ammo 180 Grain TTSX Polymer Tipped Spitzer Boat Tail Lead-Free$55.50
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Target Sports USA
Sako Powerhead Blade 300 Winchester Magnum Ammo 170 Grain Lead Free - JAS-PHB300WM170B$66.50
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Target Sports USA
Federal Premium 300 Winchester Magnum Ammo 180 Grain Trophy Bonded Tip - P300WTT1$49.02
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Target Sports USA
Ammo Inc. Hunt LR 300 Winchester Magnum Ammo 180 Grain Super Shock Tip - 300WM180SST-A20$40.99
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Target Sports USA
Sako TRG Precision 300 Winchester Magnum Ammo 175 Grain Open Tip Match - JAS-TRG300WM/175B$66.50
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Target Sports USA
Norma Ecostrike 300 Winchester Magnum Ammo 165 Grain Polymer Tip - 20177502$47.50
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Target Sports USA
Norma Bondstrike 300 Winchester Mag Ammo 180 Grain Bonded Polymer Tip - 20176332$43.50
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Target Sports USA
Federal Premium 300 Winchester Magnum Ammo 200 Grain Terminal Ascent - P300WTA1$54.75
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Target Sports USA
Federal Premium 300 Winchester Magnum Ammo 165 Grain Barnes TSX - P300WR$52.02
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Target Sports USA
Black Hills 300 Winchester Magnum Match Ammo 190 Grain Hollow Point$46.66
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Target Sports USA
Berger Match Grade 300 Winchester Magnum Ammo 168 Grain Classic Hunter$69.99
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Target Sports USA
Lapua TRX 300 Winchester Magnum Ammo 165 Grain Expanding (Lead-Free) - N317205$59.99
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Target Sports USA
Black Hills Gold 300 Winchester Magnum Ammo 165 Grain Hornady GMX$53.63
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Target Sports USA
Hornady American Whitetail Tipped 300 Winchester Magnum Ammo 165 Grain Polymer Tip - 82024$32.83
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Target Sports USA
Winchester Copper Impact 300 Winchester Magnum Ammo 150 Grain Polymer Tip - X300CLF$42.99
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Target Sports USA
Hornady Precision Hunter 300 Winchester Magnum Ammo 178 Grain ELD-X - 82041$51.99
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Target Sports USA
Hornady Precision Hunter 300 Winchester Magnum Ammo 200 Grain Spitzer Boat Tail - 82002$51.99
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Target Sports USA
Sig Sauer Platinum Hunter 300 Winchester Magnum Ammo 180 Grain AccuBond - E3WMPH180-20$51.99
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Good 4 Guns · 2 offers
Sako Powerhead Blade 300 Win Mag Ammo 174 Grain$59.99
Shipping calculated in cart
Palmetto State Armory
Nemo Arms .300WM 145gr FMJ Ammo 20rds - NA-RT-300WM-145FMJ-PPU$14.99
Shipping calculated in cart
MidwayUSA · 3 offers
Swift High Grade Big Game Hunting 300 Winchester Magnum Ammo 180 Grain Swift A-Frame Bonded Round Nose Box of 20$100.99
Free shipping over $100
MidwayUSA · 2 offers
Lapua 300 Winchester Magnum Ammo 165 Grain Lapua TRX Polymer Tip Lead Free Box of 10$62.99
$70.99 shipped · $8 shipping, free over $100
MidwayUSA
Nosler Custom 300 Winchester Magnum Ammo 200 Grain Nosler AccuBond Bonded Polymer Tip Box of 20$119.99
Free shipping over $100
.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.
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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.