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Showing 1–16 of 90 results

  • Atomic Ammunition 300 Winchester Magnum Ammo 220 Grain Jacketed Hollow Point Box of 20

    Atomic Ammunition 300 Winchester Magnum Ammo 220 Grain Jacketed Hollow Point Box of 20

    $59.99$547.99
    $47.99$438.39
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Range & Target
    Grain Weight 220 Grains
    Quantity 20 Round
    Muzzle Velocity 2600 Feet Per Second
    Muzzle Energy 3302 Foot Pounds
    Bullet Style Jacketed Hollow Point
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.629
    Sectional Density 0.331
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Atomic Ammunition Subsonic 300 Winchester Magnum Ammo 175 Grain Jacketed Hollow Point Box of 20

    Atomic Ammunition Subsonic 300 Winchester Magnum Ammo 175 Grain Jacketed Hollow Point Box of 20

    $59.99$547.99
    $47.99$438.39
    Availability: In StockSelect options This product has multiple variants. The options may be chosen on the product page
  • Barnes Harvest 300 Winchester Magnum Ammo 180 Grain Sierra GameKing Polymer Tip Box of 20

    Barnes Harvest 300 Winchester Magnum Ammo 180 Grain Sierra GameKing Polymer Tip Box of 20

    $39.99$355.99
    $31.99$284.79
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 180 Grains
    Quantity 20 Round
    Muzzle Velocity 2960 Feet Per Second
    Muzzle Energy 3503 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Sierra GameKing
    Lead Free No
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.547
    Sectional Density 0.271
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Barnes Precision Match 300 Winchester Magnum Ammo 220 Grain Barnes Open Tip Match Jacketed Hollow Point Box of 20

    Barnes Precision Match 300 Winchester Magnum Ammo 220 Grain Barnes Open Tip Match Jacketed Hollow Point Box of 20

    $62.99$595.99
    $50.39$476.79
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Range & Target
    Grain Weight 220 Grains
    Quantity 20 Round
    Muzzle Velocity 2775 Feet Per Second
    Muzzle Energy 3761 Foot Pounds
    Bullet Style Jacketed Hollow Point
    Bullet Brand And Model Barnes Open Tip Match
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.611
    Sectional Density 0.331
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Barnes VOR-TX 300 Winchester Magnum Ammo 150 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    Barnes VOR-TX 300 Winchester Magnum Ammo 150 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    $68.99$609.99
    $55.19$487.99
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 150 Grains
    Quantity 20 Round
    Muzzle Velocity 3285 Feet Per Second
    Muzzle Energy 3595 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Barnes Tipped Triple-Shock X
    Lead Free Yes
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.42
    Sectional Density 0.226
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Barnes VOR-TX 300 Winchester Magnum Ammo 165 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    Barnes VOR-TX 300 Winchester Magnum Ammo 165 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    $54.99$539.99
    $43.99$431.99
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 165 Grains
    Quantity 20 Round
    Muzzle Velocity 3120 Feet Per Second
    Muzzle Energy 3566 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Barnes Tipped Triple-Shock X
    Lead Free Yes
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.442
    Sectional Density 0.248
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Barnes VOR-TX 300 Winchester Magnum Ammo 180 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    Barnes VOR-TX 300 Winchester Magnum Ammo 180 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    $59.99$587.99
    $47.99$470.39
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 180 Grains
    Quantity 20 Round
    Muzzle Velocity 2960 Feet Per Second
    Muzzle Energy 3503 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Barnes Tipped Triple-Shock X
    Lead Free Yes
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.484
    Sectional Density 0.271
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Barnes VOR-TX Long Range 300 Winchester Magnum Ammo 190 Grain Barnes Long Range X (LRX) Polymer Tip Lead Free Box of 20

    Barnes VOR-TX Long Range 300 Winchester Magnum Ammo 190 Grain Barnes Long Range X (LRX) Polymer Tip Lead Free Box of 20

    $59.99$587.99
    $47.99$470.39
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 190 Grains
    Quantity 20 Round
    Muzzle Velocity 2880 Feet Per Second
    Muzzle Energy 3500 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Barnes Long Range X (LRX)
    Lead Free Yes
    Case Type Nickel Plated
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.54
    Sectional Density 0.286
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Barnes VOR-TX Reduced Recoil 300 Winchester Magnum Ammo 130 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    Barnes VOR-TX Reduced Recoil 300 Winchester Magnum Ammo 130 Grain Barnes Tipped Triple-Shock X Polymer Tip Lead Free Box of 20

    $62.99$595.99
    $50.39$476.79
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 130 Grains
    Quantity 20 Round
    Muzzle Velocity 2910 Feet Per Second
    Muzzle Energy 2445 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Barnes Tipped Triple-Shock X
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.337
    Sectional Density 0.196
    Test Barrel Length 24 Inches
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Berger Match Grade 300 Winchester Magnum Ammo 168 Grain Berger Match Classic Hunter Jacketed Hollow Point Box of 20

    Berger Match Grade 300 Winchester Magnum Ammo 168 Grain Berger Match Classic Hunter Jacketed Hollow Point Box of 20

    $76.99 $61.59 Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 168 Grains
    Quantity 20 Round
    Muzzle Velocity 3150 Feet Per Second
    Muzzle Energy 3702 Foot Pounds
    Bullet Style Jacketed Hollow Point
    Bullet Brand And Model Berger Match Classic Hunter
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.489
    Sectional Density 0.253
    Velocity Rating Supersonic
    Country of Origin United States of America
  • Berger Match Grade 300 Winchester Magnum Ammo 185 Grain Berger Match Classic Hunter Jacketed Hollow Point Box of 20

    Berger Match Grade 300 Winchester Magnum Ammo 185 Grain Berger Match Classic Hunter Jacketed Hollow Point Box of 20

    $75.99$723.99
    $60.79$579.19
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 185 Grains
    Quantity 20 Round
    Muzzle Velocity 3079 Feet Per Second
    Muzzle Energy 3895 Foot Pounds
    Bullet Style Jacketed Hollow Point
    Bullet Brand And Model Berger Match Classic Hunter
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.533
    Sectional Density 0.279
    Velocity Rating Supersonic
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Black Hills 300 Winchester Magnum Ammo 190 Grain Open Tip Match

    Black Hills 300 Winchester Magnum Ammo 190 Grain Open Tip Match

    $75.99$723.99
    $60.79$579.19
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Range & Target
    Grain Weight 190 Grains
    Quantity 20 Round
    Muzzle Velocity 2950 Feet Per Second
    Muzzle Energy 3672 Foot Pounds
    Bullet Style Open Tip Match
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    Bullet Coating Non-Coated
    Velocity Rating Supersonic
    Select options This product has multiple variants. The options may be chosen on the product page
  • Black Hills Gold 300 Winchester Magnum Ammo 180 Grain Barnes Triple-Shock X Solid Hollow Point Lead Free

    Black Hills Gold 300 Winchester Magnum Ammo 180 Grain Barnes Triple-Shock X Solid Hollow Point Lead Free

    $70.99$695.99
    $56.79$556.79
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 180 Grains
    Quantity 20 Round
    Muzzle Velocity 2950 Feet Per Second
    Muzzle Energy 3498 Foot Pounds
    Bullet Style Solid Hollow Point
    Bullet Brand And Model Barnes Triple-Shock X
    Lead Free Yes
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.453
    Sectional Density 0.271
    Velocity Rating Supersonic
    Select options This product has multiple variants. The options may be chosen on the product page
  • Browning Long Range Pro Hunter 300 Winchester Magnum Ammo 180 Grain Sierra Tipped GameKing Polymer Tip Box of 20

    Browning Long Range Pro Hunter 300 Winchester Magnum Ammo 180 Grain Sierra Tipped GameKing Polymer Tip Box of 20

    $49.99$433.99
    $39.99$347.19
    Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 180 Grains
    Quantity 20 Round
    Muzzle Velocity 2900 Feet Per Second
    Muzzle Energy 3361 Foot Pounds
    Bullet Style Polymer Tip
    Bullet Brand And Model Sierra Tipped GameKing
    Lead Free No
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.515
    G7 Ballistic Coefficient 0.258
    Sectional Density 0.271
    Country of Origin United States of America
    Select options This product has multiple variants. The options may be chosen on the product page
  • Browning Silver Series 300 Winchester Magnum Ammo 180 Grain Jacketed Soft Point Box of 20

    Browning Silver Series 300 Winchester Magnum Ammo 180 Grain Jacketed Soft Point Box of 20

    $39.99 $31.99 Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 180 Grains
    Quantity 20 Round
    Muzzle Velocity 2960 Feet Per Second
    Muzzle Energy 3501 Foot Pounds
    Bullet Style Jacketed Soft Point
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    G1 Ballistic Coefficient 0.382
    Velocity Rating Supersonic
    Country of Origin United States of America
  • Buffalo Bore Supercharged 300 Winchester Magnum Ammo 150 Grain Spitzer Box of 20

    Buffalo Bore Supercharged 300 Winchester Magnum Ammo 150 Grain Spitzer Box of 20

    $63.99 $51.19 Availability: In Stock

    Product Information

    Cartridge 300 Winchester Magnum
    Best Use Hunting
    Grain Weight 150 Grains
    Quantity 20 Round
    Muzzle Velocity 3350 Feet Per Second
    Muzzle Energy 3737 Foot Pounds
    Bullet Style Jacketed Soft Point
    Lead Free No
    Case Type Brass
    Primer Boxer
    Corrosive No
    Reloadable Yes
    Velocity Rating Supersonic
    Country of Origin United States of America

300 Win Mag Ammo for Sale – Power, Precision, and Performance in One Round

Looking for 300 Win Mag ammo for sale that delivers unbeatable long-range accuracy and stopping power? At Reloading Supplies HQ, we carry a wide selection of 300 Winchester Magnum cartridges ideal for big game hunting, long-range precision shooting, and tactical applications. Whether you’re hunting elk at 500 yards or dialing in at the range, 300 Win Mag is a trusted, time-tested round that performs when it matters most.

With superior ballistic performance and high muzzle energy, 300 Win Mag (short for .300 Winchester Magnum) is a top choice among seasoned hunters, competitive shooters, and law enforcement marksmen.


Why Choose 300 Win Mag Ammo?

  • Outstanding Long-Range Accuracy – Excellent ballistics with flat trajectories

  • High Energy Transfer – Devastating performance on large game like elk, moose, and bear

  • Proven Track Record – Used by military snipers and professional hunters worldwide

  • Reliable in Harsh Conditions – Consistent performance across varying climates and terrain

  • Available in a Variety of Bullet Types and Weights – Suited for everything from target shooting to big-game hunting


Top Brands We Carry for 300 Win Mag Ammo

You’ll find high-quality 300 Win Mag cartridges from top manufacturers, including:

  • Hornady Precision Hunter & ELD-X

  • Federal Premium & Fusion

  • Winchester Ballistic Silvertip

  • Remington Core-Lokt

  • Barnes VOR-TX

  • Nosler Trophy Grade

We offer a variety of loads featuring bullet weights ranging from 150 to 220 grains, so whether you’re at the bench or in the field, you can choose the ideal match for your rifle and purpose.


Popular Bullet Types for 300 Win Mag

Bullet Type Best For
Polymer Tip (ELD-X, AccuBond) Long-range hunting and expansion
Soft Point (SP, PSP) Traditional hunting applications
Ballistic Tip Flat shooting, excellent expansion
Hollow Point Boat Tail (HPBT) Match-grade accuracy
Copper (Barnes TSX) Lead-free, deep penetration

Is 300 Win Mag Right for You?

300 Win Mag is a versatile powerhouse. Its high velocity and energy make it a favorite for North American big game hunting. The flat trajectory allows accurate shooting well past 600 yards with minimal drop, making it a preferred round for long-distance engagements.

Whether you’re after moose in Alaska or dialing in steel targets at 1,000 yards, this cartridge delivers consistent, hard-hitting results.


Shop Related Categories


Frequently Asked Questions (FAQ)

Q1: What is the effective range of 300 Win Mag?
A: With the right setup, 300 Win Mag can remain effective and accurate out to 1,200 yards or more, especially with match-grade loads and optics.

Q2: Is 300 Win Mag overkill for deer?
A: While it’s more powerful than necessary for whitetail deer, it provides a very flat trajectory and ensures a clean ethical kill. For larger game like elk or moose, it’s ideal.

Q3: Can I shoot 300 Win Mag in a 30-06 rifle?
A: No. These cartridges are not interchangeable and using the wrong caliber can be dangerous. Always match ammo to your rifle’s chamber.

Q4: What’s the recoil like on a 300 Win Mag?
A: It has a noticeable recoil, more than 30-06 Springfield or .308, but it’s manageable with proper rifle design or a muzzle brake.

Q5: Is there a lead-free option for 300 Win Mag?
A: Yes. Look for copper bullets like the Barnes TSX for lead-free performance, which are also legal in states with lead restrictions.

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