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300 WIN MAG for Sale
500 Rounds of Browning BXR Rapid Expansion Ammunition 300 Winchester Magnum 155 Grain Matrix Tip Box of 20 For Sale$1,350.00 Add to cart
The .300 Winchester Magnum (also known as .300 Win Mag Ammo, or 300WM) is a bottlenecked, belted magnum rifle cartridge that was first introduced by the Winchester Repeating Arms Company in 1963. The .300 Winchester Magnum is a magnum cartridge designed to fit into the standard rifle action. It is inspired by the .375 H&H Magnum, which was blown out, lengthened, then reduced to fit the .30 caliber (7.82 mm) bullet.
The .300 Win Mag Ammo is very versatile and is used by a broad range of people, including hunters, target shooters, military units, and police departments. The 300 Win mag cartridge is an efficient all-rounder with bullet options which range from the lighter shooting 165-grain options to the more difficult hitting 200+ grain choices offered by the manufacturer.
300 Win Mag is the most well-loved .30 caliber magnum for American hunters, even though it is overpowered by the more robust .300 and .30-378 Weatherby Magnums and the modern .300 Remington Ultra Magnum. It’s a favorite choice to hunt elk, moose, and bighorn sheep because it offers superior long-range performance and a higher bullet weight than most .30 capacity cartridges. Law enforcement and military agencies have used the cartridge to practice long-range sniping and marksmanship. It has won numerous thousand-yard (910 m) contests to prove its precision since its launch.
300 Win Mag Design and Specifications
300 Win Mag Ammo uses the exact design of the case head used in the .375 H&H Magnum, its predecessor cartridge. Its taper was decreased to allow the cartridge to have a greater capacity to improve its powder capacity.
The longer length of the case and the shift of the shoulder to the left over the .338 Winchester Magnum allowed for the reframing of the .308 Magnum Norma and the .30-338 Winchester chamber to dimensions of the .300 Winchester Magnum. On the negative side, there was that the neck was smaller than the size of the bullet fired, which meant the bullet needed to be placed more deeply inside the case.
Cartridge Dimensions of 300 Win Mag Ammo
The organizations that standardize ammunition, SAAMI (Sporting Manufacturing of Arms and Munitions Institute) and C.I.P. (Commission Internationale Permanente for the Preuve of Arms and Feu Portatives), are the two organizations that have released guidelines for .300 WinMag Ammo Cartridge. Almost no divergence between C.I.P. and SAAMI dimensions is evident in this cartridge.
The case volume will differ from manufacturer to manufacturer, to the extent that the software for reloading QuickLOAD gives five different capacity cartridges, which can be used for reloading and reloading. They differ among manufacturers. The SAAMI specifications for the .300 Winchester Magnum case capacity is 91.5 grains of H2O (5.93 milliliters).
For four ammunition producers, the capacity of the cartridge cases is listed as follows:
- Remington 88.0 grams of H2O (5.70 milliliters)
- Federal 92.0 grains of H2O (5.96 milliliters)
- Winchester 93.8 grams of H2O (6.08 milliliters)
- Norma 95.5 grain of H2O (6.19 ml)
.300 Win Mag Cartridge Dimensions
All sizes are measured in inches (in) and millimeters (mm). The projectile’s diameter is 0.309 inches (7.85 millimeters).
SAAMI recommends a bore size of 7.6 millimeters (0.300 in) and a groove width of 7.8 millimeters (0.308 in). SAAMI recommended a barrel with six grooves measuring 2.8 millimeters (0.110 in) wide. The recommended twist ratio of 1:10 (254 millimeters).
C.I.P. determines the typical twist rate of rifling for this cartridge as 254 millimeters (1 10 inches) six grooves, O Lands equal 7.62 millimeters (0.300 in), O grooves are 7.82 (0.308 in), land width = 7.82 (0.308 in) Land width is 2.79 millimeters (0.110 in) and the type of primer is a large rifle magnum.
The SAAMI Maximum Average Pressure (M.A.P.) for this cartridge is 441.3 MPa (64,000 psi) piezo pressure (54,000 CUP). 
Based on the current C.I.P. (Commission Internationale Permanente for the Epreuve des Armes as a Feu Portatives) rules, the .300 Winchester Magnum can handle up to 430.00 MPa (62,366 psi) Pmax piezo pressure. In C.I.P. controlled countries, every rifle combination must be tested to be 125% over the maximum C.I.P. pressure to make it legal to sell to customers. This implies it is possible to test .300 Winchester Magnum chambered arms in C.I.P. Regulated countries are at present (2013) being tested for proof to 537.50 MPa (77,958 psi) P.E. piezo pressure.
300 Win Mag Ammo Performance
The factory ammunition of Winchester for 300 Win Mag is capable of 910 meters per second (3,260 Ft/s) using 150 grain (9.7 grams) bullet and 910 m/s (3,000 feet/second) using 12 gram (180 grams) bullet, but the older Western “Power Point” soft point bullets can go over 1,000 meters per second (3,400 feet per second) using 9.7 grams (150 grams) projectiles.
The maximum range of point blanks for the 9.7 grams (150 grams) bullet can be 291 meters (318 yards) yards when it is zeroed at 250 meters (270 yards). The maximum point blank range for the 12 grams (180 grams) bullet can be 300 yards when it is zeroed at 232 meters (254 yards). The capability of zeroing in the .300 Winchester Magnum and shooting without holding over up to 270 meters (300 yards) makes it one of the most flatter shooting cartridges.
|Cartridge||Criteria||Muzzle||100-yard (91 m)||200-yard (180 m)||300-yard (270 m)||400-yard (370 m)||500-yard (460 m)|
|.308 Winchester (Winchester – SXP308) 150 gr (9.7 g)||Velocity||2,825 ft/s (861 m/s)||2,616 ft/s (797 m/s)||2,417 ft/s (737 m/s)||2,226 ft/s (678 m/s)||2,044 ft/s (623 m/s)||1,871 ft/s (570 m/s)|
|Energy||2,658 ft⋅lbf (3,604 J)||2,279 ft⋅lbf (3,090 J)||1,945 ft⋅lbf (2,637 J)||1,650 ft⋅lbf (2,240 J)||1,392 ft⋅lbf (1,887 J)||1,166 ft⋅lbf (1,581 J)|
|.30-06 Springfield (Remington – PRA3006B) 165 gr (10.7 g)||Velocity||2,800 ft/s (850 m/s)||2,597 ft/s (792 m/s)||2,403 ft/s (732 m/s)||2,217 ft/s (676 m/s)||2,039 ft/s (621 m/s)||1,870 ft/s (570 m/s)|
|Energy||2,872 ft⋅lbf (3,894 J)||2,470 ft⋅lbf (3,350 J)||2,115 ft⋅lbf (2,868 J)||1,800 ft⋅lbf (2,400 J)||1,523 ft⋅lbf (2,065 J)||1,281 ft⋅lbf (1,737 J)|
|.300 Winchester Magnum (Winchester – SXP300WM) 180 gr (12 g)||Velocity||3,160 ft/s (960 m/s)||2,983 ft/s (909 m/s)||2,813 ft/s (857 m/s)||2,649 ft/s (807 m/s)||2,492 ft/s (760 m/s)||2,339 ft/s (713 m/s)|
|Energy||3,992 ft⋅lbf (5,412 J)||3,556 ft⋅lbf (4,821 J)||3,163 ft⋅lbf (4,288 J)||2,806 ft⋅lbf (3,804 J)||2,482 ft⋅lbf (3,365 J)||2,187 ft⋅lbf (2,965 J)|
|.300 Weatherby Magnum (Weatherby – N300180ACB) 180 gr (12 g)||Velocity||3,250 ft/s (990 m/s)||3,051 ft/s (930 m/s)||2,861 ft/s (872 m/s)||2,678 ft/s (816 m/s)||2,503 ft/s (763 m/s)||2,335 ft/s (712 m/s)|
|Energy||4,223 ft⋅lbf (5,726 J)||3,721 ft⋅lbf (5,045 J)||3,271 ft⋅lbf (4,435 J)||2,868 ft⋅lbf (3,888 J)||2,505 ft⋅lbf (3,396 J)||2,179 ft⋅lbf (2,954 J)|
Criticism of 300 Win Mag Ammo
300 Win Mag was developed with a neck that is smaller than the bullet. If Winchester had launched the cartridge before 1960, it would have been identical to that of the .30-338 Winchester wildcat cartridge. But when Winchester was able to create their own .300 cartridge, it was already in production .308 Norma Magnum, and the .30-338 were already in the market.
To differentiate it from other .300 magnums and also to allow chambers that were normal long .300 magnums modified to match the .300 Winchester Magnum chamber dimensions, Winchester moved the shoulder forward and extended the cartridge a bit. This resulted in the widely criticized shorter neck on this .300 Winchester Magnum.
The neck’s length was believed to interfere with accuracy as it was thought to hinder the alignment of the cartridge to the bore. However, this is not a problem in the present or since the cartridge was first designed. The fact that it has managed to win numerous 1,000-yard (910 meters) matches indicates that this issue isn’t valid.
300 Win Mag For Sale In Stock
We have a vast selection of 300 win mag ammo for sale in stock and ready to ship. We provide discreet delivery for all orders and excellent customer service that can assist you in choosing the right ammunition for your firearm. Here’s a list of our top 300 win mag ammunition offerings which are available in our shop.