Please wait...

Family Owned and Operated Ammo Sales, Stillwater OK

Orders placed at this time are estimated to take 1 to 2 business days to be shipped out of our warehouse, then normal UPS ground transit times from our warehouse in Oklahoma to you. FREE SHIPPING on any order with a subtotal of $200 or more.

300 Win Mag Ammo

Shop .300 Win Mag Ammo – Long-Range Power In Stock Now

Explore our selection of .300 Winchester Magnum (7.62×67mmB, 7.62×66BR) rifle ammunition at SGAmmo, your trusted source for bulk ammo at warehouse-direct prices. We offer a variety of premium loads from top manufacturers like Prvi Partizan, Hornady, Winchester and more, including options designed for hunting, precision shooting, and tactical applications.

Introduced in 1963, the .300 Winchester Magnum (also known as the .300 Win Mag or .300 WM) was developed by Winchester Repeating Arms Company as a belted, bottlenecked magnum rifle cartridge. It was designed to fit in a standard-length rifle action, making it more versatile than its predecessors. The .300 Win Mag is based on the .375 H&H Magnum case, necked down to accept a .30 caliber bullet. This design allows for higher velocities and flatter trajectories, making it effective for long-range shooting and suitable for a wide range of big game hunting.

All rounds are ready to ship immediately—no backorders, no drop shipping. SGAmmo offers fast processing, competitive pricing, and reliable service, making it easy to stock up and stay prepared. Whether gearing up for long-range hunts, honing your precision skills at the range, or expanding your ammo reserves, shop now to get top-quality .300 Winchester Magnum ammunition delivered right to your door!

Image Name Qty. In Stock Price

20 Round Box - 300 Winchester Magnum 180 Grain SPCE Soft Point Ammo by Sellier Bellot - SB300B

SKU: SB300B - Box
46 $19.95 Each 20+ @$18.95 ($1.00 Per Round)

400 Round Case - 300 Winchester Magnum 180 Grain SPCE Soft Point Ammo by Sellier Bellot - SB300B

SKU: SB300B - Case
8 $379.00 Each FREE
SHIPPING
2+ @$369.80 ($0.95 Per Round)
300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

20 Round Box - 300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

SKU: PP361
120+ $27.95 Each 10+ @$23.95 ($1.40 Per Round)
300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

200 Round Case - 300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

SKU: PP3001 - Case
12+ $239.50 Each FREE
SHIPPING
2+ @$229.50 ($1.20 Per Round)
300 Winchester Magnum 165 Grain Pointed Soft Point Ammo by Prvi Partizan - PP3002

20 Round Box - 300 Winchester Magnum 165 Grain Pointed Soft Point Ammo by Prvi Partizan - PP3002

SKU: PP362
120+ $27.95 Each 10+ @$26.95 ($1.40 Per Round)

200 Round Case - 300 Winchester Magnum 165 Grain Pointed Soft Point Ammo by Prvi Partizan - PP3002

SKU: PP362 - case
16+ $239.50 Each FREE
SHIPPING
2+ @$229.50 ($1.20 Per Round)
300 Winchester Magnum 180 Grain Soft Point Ammo by Prvi Parizan - PP3003

20 Round Box - 300 Winchester Magnum 180 Grain Soft Point Ammo by Prvi Parizan - PP3003

SKU: PP36
12 $29.95 Each 10+ @$26.95 ($1.50 Per Round)

200 Round Case - 300 Winchester Magnum 180 Grain Soft Point Ammo by Prvi Parizan - PP3003

SKU: PP36 -- case
1 $269.50 Each FREE
SHIPPING
2+ @$259.50 ($1.35 Per Round)
300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

20 Round Box - 300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

SKU: X300CLF - Box
140 $44.95 Each 10+ @$39.95 ($2.25 Per Round)
300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

200 Round Case - 300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

SKU: X300CLF - Case
12+ $399.50 Each FREE
SHIPPING
1+ @$399.50 ($2.00 Per Round)

20 Round Box - 300 Winchester Magnum 178 Grain ELD Match Hornady Match Ammo - 82043

SKU: 82043 - Box
110 $49.95 Each 10+ @$46.95 ($2.50 Per Round)
300 Winchester Magnum 178 Grain ELD Match Hornady Match Ammo - 82043

200 Round Case - 300 Winchester Magnum 178 Grain ELD Match Hornady Match Ammo - 82043

SKU: 82043 - Case
10 $469.50 Each FREE
SHIPPING
2+ @$459.50 ($2.35 Per Round)

20 Round Box - 300 Winchester Magnum 195 Grain ELD Hornady Match Ammo - 82180

SKU: 82180 - Box
53 $49.95 Each 10+ @$46.95 ($2.50 Per Round)

200 Round Case - 300 Winchester Magnum 195 Grain ELD Hornady Match Ammo - 82180

SKU: 82180 - Case
6 $469.50 Each FREE
SHIPPING
2+ @$459.50 ($2.35 Per Round)
300 Winchester Magnum 150 Grain Jacketed Soft Point Federal Power Shok Ammo - 300WGS

20 Round Box - 300 Winchester Magnum 150 Grain Jacketed Soft Point Federal Power Shok Ammo - 300WGS

SKU: 300WGS - Box
20 $35.95 Each 10+ @$30.95 ($1.80 Per Round)

20 Round Box- Federal 300 Winchester Magnum Gold Medal Match 190 Grain BTHP Ammo - GM300WM

SKU: GM300WM
142 $52.95 Each 10+ @$51.95 ($2.65 Per Round)

200 Round Case - Federal 300 Winchester Magnum Gold Medal Match 190 Grain BTHP Ammo - GM300WM

SKU: GM300WM - case
15+ $519.50 Each FREE
SHIPPING
1+ @$519.50 ($2.60 Per Round)

20 Round Box - 300 Winchester Magnum 180 Grain TXRG Sellier Bellot Exergy Ammo - SB300XA

SKU: SB300XA - Box
14 $31.95 Each 10+ @$28.95 ($1.60 Per Round)

20 Round Box - 300 Winchester Magnum 180 Grain SPCE Soft Point Ammo by Sellier Bellot - SB300B

SKU: SB300B - Box
46 In Stock
$19.95 Each 20+ @$18.95 ($1.00 Per Round)

400 Round Case - 300 Winchester Magnum 180 Grain SPCE Soft Point Ammo by Sellier Bellot - SB300B

SKU: SB300B - Case
8 In Stock
$379.00 Each
FREE SHIPPING
2+ @$369.80 ($0.95 Per Round)
300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

20 Round Box - 300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

SKU: PP361
120+ In Stock
$27.95 Each 10+ @$23.95 ($1.40 Per Round)
300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

200 Round Case - 300 Winchester Magnum 150 Grain Soft Point Ammo by Prvi Partizan - PP361 or PP3001

SKU: PP3001 - Case
12+ In Stock
$239.50 Each
FREE SHIPPING
2+ @$229.50 ($1.20 Per Round)
300 Winchester Magnum 165 Grain Pointed Soft Point Ammo by Prvi Partizan - PP3002

20 Round Box - 300 Winchester Magnum 165 Grain Pointed Soft Point Ammo by Prvi Partizan - PP3002

SKU: PP362
120+ In Stock
$27.95 Each 10+ @$26.95 ($1.40 Per Round)

200 Round Case - 300 Winchester Magnum 165 Grain Pointed Soft Point Ammo by Prvi Partizan - PP3002

SKU: PP362 - case
16+ In Stock
$239.50 Each
FREE SHIPPING
2+ @$229.50 ($1.20 Per Round)
300 Winchester Magnum 180 Grain Soft Point Ammo by Prvi Parizan - PP3003

20 Round Box - 300 Winchester Magnum 180 Grain Soft Point Ammo by Prvi Parizan - PP3003

SKU: PP36
12 In Stock
$29.95 Each 10+ @$26.95 ($1.50 Per Round)

200 Round Case - 300 Winchester Magnum 180 Grain Soft Point Ammo by Prvi Parizan - PP3003

SKU: PP36 -- case
1 In Stock
$269.50 Each
FREE SHIPPING
2+ @$259.50 ($1.35 Per Round)
300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

20 Round Box - 300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

SKU: X300CLF - Box
140 In Stock
$44.95 Each 10+ @$39.95 ($2.25 Per Round)
300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

200 Round Case - 300 Win Mag 150 Grain Extreme Point Copper Impact Winchester Ammo - X300CLF

SKU: X300CLF - Case
12+ In Stock
$399.50 Each
FREE SHIPPING
1+ @$399.50 ($2.00 Per Round)

20 Round Box - 300 Winchester Magnum 178 Grain ELD Match Hornady Match Ammo - 82043

SKU: 82043 - Box
110 In Stock
$49.95 Each 10+ @$46.95 ($2.50 Per Round)
300 Winchester Magnum 178 Grain ELD Match Hornady Match Ammo - 82043

200 Round Case - 300 Winchester Magnum 178 Grain ELD Match Hornady Match Ammo - 82043

SKU: 82043 - Case
10 In Stock
$469.50 Each
FREE SHIPPING
2+ @$459.50 ($2.35 Per Round)

20 Round Box - 300 Winchester Magnum 195 Grain ELD Hornady Match Ammo - 82180

SKU: 82180 - Box
53 In Stock
$49.95 Each 10+ @$46.95 ($2.50 Per Round)

200 Round Case - 300 Winchester Magnum 195 Grain ELD Hornady Match Ammo - 82180

SKU: 82180 - Case
6 In Stock
$469.50 Each
FREE SHIPPING
2+ @$459.50 ($2.35 Per Round)
300 Winchester Magnum 150 Grain Jacketed Soft Point Federal Power Shok Ammo - 300WGS

20 Round Box - 300 Winchester Magnum 150 Grain Jacketed Soft Point Federal Power Shok Ammo - 300WGS

SKU: 300WGS - Box
20 In Stock
$35.95 Each 10+ @$30.95 ($1.80 Per Round)

20 Round Box- Federal 300 Winchester Magnum Gold Medal Match 190 Grain BTHP Ammo - GM300WM

SKU: GM300WM
142 In Stock
$52.95 Each 10+ @$51.95 ($2.65 Per Round)

200 Round Case - Federal 300 Winchester Magnum Gold Medal Match 190 Grain BTHP Ammo - GM300WM

SKU: GM300WM - case
15+ In Stock
$519.50 Each
FREE SHIPPING
1+ @$519.50 ($2.60 Per Round)

20 Round Box - 300 Winchester Magnum 180 Grain TXRG Sellier Bellot Exergy Ammo - SB300XA

SKU: SB300XA - Box
14 In Stock
$31.95 Each 10+ @$28.95 ($1.60 Per Round)