Even at these velocities, though, the cartridges maintain the legendary accuracy the .300 Win. [22], In January 2014, the U.S. Department of Defense annual testing report found that the older A191 or MK 248 Mod 0 .300 Winchester Magnum service round loaded with aerodynamically less efficient 190 gr (12.32 g) Sierra MatchKing Hollow Point Boat Tail (HPBT) bullets fired from the XM2010 demonstrated adequate performance and lethality. 30-06 vs 308 vs 300 Win Mag Ammo Due to the short neck, heavier bullets particularly those weighing greater than 13 grams (200 gr) and mono-metal bullets such as the Barnes X bullets will need to be seated more deeply into the cartridge. Hunters found the cartridge to be an effective all-around choice with bullet options ranging from the flatter shooting 165 grain to the harder hitting 200+ grain selections available from the factory. If we were to take averages of all the rounds, then there would be a slight advantage to for the 7mm Rem Mag rounds at each yard marker and each time the difference is less than 100fps. SAAMI recommended a six-groove barrel with each groove being 2.8 millimetres (0.110 in) wide. [3], The .300 Winchester is extremely versatile and has been adopted by a wide range of users including hunters, target shooters, military units, and law enforcement departments. Notably, the .300 Win Mag cartridge fires a projectile that on average can best the .308 Winchester cartridge by 50% on overall distance while maintaining lethality. [4] It is a popular selection for hunting moose, elk, and bighorn sheep as it can deliver better long range performance with better bullet weight than most other .30 caliber cartridges. Initially we (it’s always good to bring a friend with this much cutting) used a cordless Sawzall to make the cuts, after the battery died, we switched to a hacksaw. So, the.300 Win Mag is slightly more powerful, has a slightly flatter trajectory, and has somewhat more recoil than the.30-06. After bore sighting the rifle and confirming zero at 50-yards. This results in a flatter trajectory, more resistance to wind drift, and more retained energy at longer range. McPherson. Winchester 93.8 grains of H2O (6.08 ml) That means it was 55 F, heavy rain, and overcast with mild 5 to 10 mile per hour winds. Many consider the .300 Winchester Magnum to be on the lighter side of what is required for the largest bears, but hunters have had success with the cartridge against these large bruins.[16]. This was an experiment I kicked around for the past year or so. Mag. I would suspect the 178 gr would be very similar. Due to the power and performance of the .300 Winchester Magnum cartridge the cartridge is more likely to be employed by specialist units within a police department rather than as a general service weapon issued to law enforcement agents. This created the much criticized short neck of the .300 Winchester Magnum. Just purchased a Rem 700 Sendero SFII, 300 WinMag with a 26" tube and a 1:10 twist. 300 Ultra Mag vs 300 Win Mag The.300 Ultra Mag can fire the same weight bullet approximately 200-300fps faster than the.300 Win Mag. Each reduction in barrel length averaged 39.6 ft/sec in velocity loss. The lengthening of the case and the move of the shoulder forward over the .338 Winchester Magnum allowed for the reaming of the .308 Norma Magnum or .30-338 Winchester chamber to dimensions of the .300 Winchester Magnum. Long popular with big game hunters, the 300 Winchester Magnum has also been adopted by the US military as part of the M24 Sniper Weapons System and Mk 13. 300 Win Mag 200 gr ELD-X® Precision Hunter® Item #82002 | 20/Box . My follow up article is here Does size matter? However, the handloader can take advantage of modern advances in powder technology and actually exceed the velocity of the MK 248 MOD 1 cartridge while still loading to maximum SAAMI cartridge overall length, and maintaining safe pressure. While it wouldn’t be your first choice for hunting ammunition, Federal Gold Medal works well, is widely available, and serves as a good standard for comparison. Mag., or become just another .300 magnum … The .300 Weatherby Magnum was introduced in 1944. Recommended twist ratio is 1:10 (254 mm). Finally, the lure of potential internet greatness set in and I decided to pull the trigger. This greater recoil can make the .300 Winchester Magnum, despite its inherent accuracy advantages, a harder cartridge to shoot accurately, when compared to non-magnum .30 caliber cartridges such as the .30-06 Springfield or the .308 Winchester. The .300 Winchester Magnum is powerful enough to hunt any North American game animal. All sizes in inches (in) and millimeters (mm). Mag. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps. The crown was not re-cut, burrs were not removed and the gun was shot with the saw cut, as-is. Norma Bondstrike Ammunition 300 Winchester Magnum 180 Grain Polymer Tip Boat Tail Box of 20. If you are interested in more formal analysis of how barrel length affects velocity, take a look at Ballistics by the Inch. We cut it back at 1-inch intervals ending up with a 16.25 inch barrel. Post was not sent - check your email addresses! … [7], The .300 Winchester Magnum's high availability in popular rifles such as Winchester's Model 70 and Remington Model 700 made the cartridge a popular choice among the shooting public. The ability to zero the .300 Winchester Magnum and shoot without hold over to 270 metres (300 yd) makes the cartridge one of the flatter shooting cartridges. This is the first day the gun will be fired. I developed a mild headache from the 50 rounds of ammunition I shot, despite wearing both ear plugs and muffs. The projectile diameter should be 0.309 in (7.85 mm) [8]. The 16.25 inch made my shooting buddy laugh. Maximum effective range is generally accepted to be 1,210 yards (1,110 m) with ammunition incorporating low-drag projectiles. [citation needed] However, bullets weighing between 7.1–16.2 g (110–250 gr) are available to the reloader for the .300 Winchester Magnum. Weight decreased 1.82 pounds to 16.46 pounds with the 16.25 inch barrel. Custom Remington 700 16.5″ 300 Winchester Magnum follow up, Blueprinting, or truing a rifle action ensures the receiver face, threads, lugs, bolt lugs and bolt face are square to the center line of the receiver. UPDATE: 1/1/15, see below for 308 Winchester and 223 Remington. The venerable 300 Win. Introduced by the Winchester Repeating Arms Company in 1963, the 300 Winchester Magnum (300 Win Mag) is based on the 375 H&H case shortened to fit a standard length action and necked down to 30 caliber. Troubleshooting seized ejectors. Chronograph data was recorded using a MagnettoSpeed V2 barrel mounted ballistic chronograph. PSA: Don’t melt your MagnetoSpeed with a suppressor! Prior to the design of the .300 Winchester Magnum there were several cartridges that provided what could be best described as a magnum level of energy. A 3 ft/sec increase in muzzle velocity was recorded between the 22.25 and 21.25 inch barrels. Great care has been given by Hornady engineers to develop superior, match­-accurate hunting loads that allow the ELD­-X ® bullet to achieve its maximum ballistic potential. The Weatherby's standard length magnum case was soon noticed. I did periodically make scope adjustments to utilize different parts of the target, but in general, groups were within 1 inch of the group fired with the previous barrel length. (Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings the .300 Winchester Magnum can handle up to 430.00 MPa (62,366 psi) Pmax piezo pressure. is simply one of the most flexible cartridges for North America and African plains game,” Phil says. can nudge a 200-grain bullet to about 2,400 fps and generate muzzle energy of about 2,550 ft lbs. A Shilen #8 contour chrome-moly barrel had been threaded and chambered on the gun. That speed brings a nice, flat trajectory that makes it a bit easier to hit at long distance. Only the .300 Winchester Magnum was to survive as a readily available cartridge. If the .300 Winchester were given a magnum-length receiver, where a longer bullet could be seated properly, it could utilize these longer bullets without issue. The .300 Winchester Magnum was designed with a neck which is shorter than the diameter of its bullet. The goal of this article is to help you determine which .300 Win Mag Rifle is best for you. regulated countries are currently (2013) proof tested at 537.50 MPa (77,958 psi) PE piezo pressure.[10]. The table below assumes a 100 yard zero and a full value, 10 mph crosswind for wind drift. The Chattanooga Police Department[24] and Minot Police Department S.W.A.T units[25] and the L.A. County Sheriffs Department's Special Enforcement Bureau[26] which have adopted the .300 Winchester Magnum in some capacity. The.308 Win. If (and that’s big if) I do it again for another cartridge I’ll probably fire more rounds at each interval, shoot a slow and fast powder at each length, and use a light contour barrel since it would be easier to cut. The.300 Win Mag shoot heavier bullets at a higher velocity than the.30-06 (~200-300fps faster with the same bullet). The short neck was thought to hinder accuracy because it would prevent the alignment of cartridge to the bore, but this is rarely an issue either today or when the cartridge was designed. Few .30 caliber (7.62 mm) standard length cartridges can match the performance and versatility of the .300 Winchester Magnum. It is an excellent cartridge choice for all plains game under 680 kilograms (1,500 lb). wins here because it has the powder capacity to handle bullets as heavy as 220 grains, moving them as fast as 2,770 fps to generate a bone-crushing 3,800 ft lbs of energy. Military and law enforcement departments adopted the cartridge for long range sniping and marksmanship. Cartridge Type: RifleHeight: 2.62\"Width: 0.532\"Average FPS: 3026Average Energy: 3517Average Gr: 173Recoil: 2.39Power Rank: 5.23 of 20 The .300 Winchester Mag (.300 Win Mag) was designed in 1963 by Winchester Repeating ArmsCompany. 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