300 win mag ballistics chart
However, it is also an excelent cartridge for mountain hunting conditions such as found in the Asian Mountains, Rockies and Andes, where fast bullets carrying enough energy to sit game fast while being able to buck cross winds efficiently are praised. A 3 inch MRT also allows for a little bit of human error, which is probably a good thing when shooting in the field. Average Point Blank Range of The .300 Win Mag remains the most popular .30 caliber magnum with American hunters, despite being surpassed in performance by the more powerful .300 and .30-378 Weatherby Magnums and the newer .300 Remington Ultra Magnum, .300 Norma Magnum, .30 Nosler, and .300 PRC. It is a great investment if you want to get into long range shooting and will be especially useful if you handload. larger 200 grain A-Frame can be used on large game such as bears. The Lamb Clinic provides a comprehensive assessment and customized treatment plan for all new patients utilizing both interventional and non-interventional treatment methods. Elk can weigh as much as 450 kilograms (1,000lb) and moose 640 kilograms (1,400lb). So a .270 Winchester round exits the barrel with kinetic energy equal to the energy required for linear vertical displacement of 3780 pounds through a one foot distance, while a .300 Winchester Magnum round exiting the barrel has energy equal to the amount required to displace 3520 pounds over the same one foot distance. This 300 Win Short Mag shows 180 grain Federal Premium Power Shok Copper Hollow Point Rounds. Both black bears[20] and grizzly bears[21] are hunted using the cartridge. Only the .300 Win Mag and the .300 Weatherby Mag survived into the 21st century as readily available cartridges, with the Winchester round by far the more popular of the two. WebWinchesters initial factory loads for the .300 featured a 150 grain bullet at 3400fps and a 180 grain bullet at 3070fps, both loads have since been reduced. If you are frustrated on your journey back to wellness - don't give up - there is hope. WebThe following ballistics tables show a side by side comparison of the .300 Winchester Magnum vs .300 Winchester Short Magnum (WSM) based on bullet weight and various Please read this section carefully. But if you look more deeply at the ballistics, youll notice a gap. Input your hunting conditions to see the drop, drift, bullet trajectory, Maximum effective range is generally accepted to be 1,210 yards (1,110m) with ammunition incorporating low-drag projectiles. As the bullet will take up volume which could have been taken by the propellant velocity advantages diminish as the weight of the bullet increases. . A almost similar 168 grain bullet is also popular among the .300 win mag as well as other .30 cal. for hunting. To help differentiate it from the other .300 magnums, and to allow for the chambers of the standard length .300 magnums to be rebored to the .300 Winchester Magnum chamber dimensions, Winchester moved the shoulder forward and lengthened the cartridge slightly. In C.I.P. For the record, this table was calculated for an air temperature of 60 degrees F and an altitude of 1000 feet. (Commission Internationale Permanente pour l'Epreuve des Armes Feu Portatives) have provided specifications for the .300 Winchester Magnum cartridge. The larger manufacturers soon noticed Weatherby's standard length magnum case, and in due time followed suit. *Casing image above is an artist rendering and not a real photo of .300 Winchester Magnum Ballistics cartridge. defines the common rifling twist rate for this cartridge as 254mm (1 in 10in), 6 grooves, lands = 7.62mm (0.300in), grooves = 7.82mm (0.308in), land width = 2.79mm (0.110in), and the primer type is large rifle magnum. Your continued use of this site indicates your acceptance of the terms and conditions specified. According to QuickLoad, the case capacities of .300 Win Mag brass produced by four ammunition manufacturers measure as follows: Web300 Win Mag 178 gr ELD-X Precision Hunter . While we have went to great lengths to make sure that it's as accurate as possible this rendering should not be used to generate specs for casings. Prior to the advent of the .300 Winchester Magnum there were already a number of .30 caliber (7.62mm) cartridges billed as offering a magnum level of performance. Mag. Compared with the 30-06 Springfield the .300 Winchester Magnum provides a roughly 400ft/s (120m/s) increase in velocity. Terms and conditions for the use of this DrLamb.com web site are found via the LEGAL link on the homepage of this site. WebThe trajectories in the table below were calculated for a maximum bullet rise of 1.5 inches above the line of sight for all small game and varmint loads, and three inches above the line of sight for all big game loads. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. The SAAMI Maximum Average Pressure (MAP) for this cartridge is 441.3MPa (64,000psi) piezo pressure (54,000 CUP). My research interests range across the broad topics of technology, coaching, teaching, learning, and volleyball. Generally, a 300 Win Mags 150 grain bullet delivers a 3,260 fps muzzle velocity, while its 180 grain bullet achieves approximately 3,000 fps. Web300 Win Mag Ballistics For 3 Different Bullet Weights. (adsbygoogle = window.adsbygoogle || []).push({}); .300 Winchester Magnum-Norma Plastic Point, .300 Winchester Magnum-Hornady InterBond, .300 Winchester Magnum-Remington Core-Lokt Pointed Soft Point - Managed Recoil, .300 Winchester Magnum-Federal Nosler Partition, .300 Winchester Magnum-Black Hills Nosler AccuBond, .300 Winchester Magnum-Remington AccuTip Boat Tail, .300 Winchester Magnum-Sellier & Bellot SPCE, .300 Winchester Magnum-Winchester XP, .300 Winchester Magnum-Federal Trophy Bonded Bear Claw, .300 Winchester Magnum-Remington Core-Lokt Ultra Bonded, .300 Winchester Magnum-Federal Nosler AccuBond, .300 Winchester Magnum-Norma Barnes Triple-Shock, .300 Winchester Magnum-Federal Nosler Partition, .300 Winchester Magnum-Hornady BTSP InterLock, .300 Winchester Magnum-Remington Core-Lokt Ultra Bonded. This resulted in a cartridge with a neck somewhat shorter than the diameter of the bullet. Everyone is encouraged to see their own healthcare professional to review what is best for them. Matrcula para el perodo Copyright 2002, 2016 by Chuck Hawks. google_ad_slot = "7610963244"; Your information will never be shared and you can unsubscribe with one click at anytime. This means that the speed and energy will vary from cartridge manufacturer to manufacturer. Sighting-in a hunting rifle to hit a certain number of inches high at 100 yards (or 100 meters) maximizes the point blank range of the rifle and cartridge and is superior to zeroing at a fixed distance like 200 yards. Furthermore, the muzzle energy of a .270 Winchester round averages out to2700 ft-lb, while a .300 Winchester Magnum round averages out to about 3520 ft-lb. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, or jacketing type. As a rough comparison, the recoil of the .300 Winchester Magnum is roughly comparable to a 12 gauge shotgun shooting 1 oz. The .300 Winchester Magnum was designed with a neck which is shorter than the diameter of its bullet. Average FPS: 3066. WebHome Ballistics Charts Ultra-high velocity, magnum ammunition is how Roy Weatherby got started in the 1940s. [12], Probably the most popular weight for the 300 Win Mag is the 180 grain bullet, with high ballistic coefficient and capable of taking down light skinned big game of any weight. Many consider the .300 Winchester Magnum to be on the lighter side of what is required for the largest bears, but loaded with heavier bullets, hunters have had success with the cartridge against these large bears.[22]. Speed and Energy are figured out using an average of all the known cartridges. Although cartridges such as the .30-378 Weatherby Magnum, .300 Remington Ultra Magnum and the .300 Weatherby Magnum all exceed performance of the .300 Winchester Magnum none of these cartridges can be chambered in a standard length action. The .300 Winchester Magnum is known for its accuracy and has been used for 910-metre (1,000yd) and 1,000-metre (1,100yd) competitions. After spending some time with this database you will most likely find the bullet that best meets your needs. The case is based off a .404 Jeffery Nitro Express by narrowing down the neck to fit a .308 (7.8mm) bullet. But probably the most popular bullet weigh is the 180-grain, offering a good balance between flat trajectory, ballistic coefficient and energy to emphatically hunt large-size big game animals such as elk and moose up to considerable distances. Please email us if you have questions about any of our product listings. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps. Make sure you're ready when the big one steps out and load-up with Hornady American Whitetail ammunition. Norma 95.5 grains of H2O (6.19 ml), .300 Winchester Magnum SAAMI cartridge dimensions. Copyright 2023 ShootersCalculator.comALL rights reserved. Remington 88.0 grains of H2O (5.70 ml) The ballistic performances based off five grain types for velocity are 3,260 ft/s .45-70 Government, 8.59mm (.338) Lazzeroni Titan, .450 Dakota, .338 Remington Ultra Magnum, .240 Weatherby Magnum, 7mm Dakota, .30-30 Winchester, .416 Weatherby Magnum, 7mm Remington Magnum, 7mm-08 Remington, .25-06 Remington, .416 Rigby, .243 Winchester, .458 Lott, .338 Winchester Magnum. Use this ballistic calculator in order to calculate the flight path of a bullet given the shooting parameters that meet your conditions. Company. The .300 Win Mag has the Accuracy and terminal performance are the cornerstones of Hornady Precision Hunter factory loaded ammunition. . The 300 Win Mag has always been considered one of the great hunting cartridges, and with the current selection of bullets, better suited for long-range shooting, Cartridge Type: Rifle Height: 2.62" Width: 0.532" Average FPS: 3026 Average Energy: 3517 Average Gr: 173 Recoil: 2.39 Power Rank: 5.23 of 20 The The down side to this performance is recoil. How to Sight in a Scope - Step by Step Guide. According to the official C.I.P. ShootersCalculator.com is in the process of being massively overhauled. If you are looking for the 270 vs 308 vs 30 06 ballistics chart, the 5.56 trajectory chart, the 300 Win Mag Ballistics data, or the 30 06 trajectory chart; you are in the right place! Select Your Gun Type. It is a flat shooting cartridge, able to hit a target at 300 yards For the best experience on our site, be sure to turn on Javascript in your browser. The .300 PRC features a 1:8 twist, ideal for bullets from 200 grains and heavier. The Series. In order to hit a distant target a rifle must be correctly sighted-in, and to accomplish that the shooter must have some working knowledge of the bullet's trajectory. such as bears with certain bullet cartridges and well-placed shots. Also, many rifles available today now have effective recoil attenuating features built into them, such as muzzle compensators and energy absorbing stocks and butt-pads, that can significantly lessen recoil as it is felt by the shooter. From Alberta to Africa, the .300 Win. Opening day of deer season comes only once a year. A maximum rise of 3 inches is appropriate for hunting the smaller species of big game, creatures from perhaps 75 pounds to 150 pounds on the hoof, which typically have a kill zone of about 8 inches from top to bottom. Learn how and when to remove this template message, Remington Model 700 Police Long Action tactical rifle, List of crew-served weapons of the U.S. Armed Forces, "Take Aim at Rifle Reloading Data | Hodgdon Reloading", "ANSI/SAAMI Velocity & Pressure Data: Centerfire Rifle", "5 Reasons the .300 Win. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. Known as the .300 PRC (Precision Rifle Cartridge), this new beltless offering is based on the .375 Ruger, a beltless magnum that outperforms the .375 H&H in a Coaching volleyball is one of my biggest passions. The 150 grain loads are known for fast wound penetration on medium sized game, WebThis interactive bullet database is free and containst 173 caliber ballistics, history, stats, and their trajectories charted out in full detail. Of course, the actual distance the bullet should hit above the point of aim at 100 yards (or 100 meters, which is about 108 yards) varies with the individual caliber and load. That is to say, .270 Winchester bullets travel 3.5 times the speed of a 737 airplane at cruising speed, while .300 Winchester Magnum bullets travel 3.4 times that same speed. Our website lists special deals on 9mm Ammo, 10mm Ammo, 45-70 Ammo, 6.5 Creedmoor ammo, 300 Blackout Ammo, 10mm Ammo, 5.56 Ammo, Underwood Ammo, Buffalo Bore Ammo and more special deals on bulk ammo. google_ad_client = "ca-pub-8417283882784443"; pressure to certify for sale to consumers. I coach high school and club girls and boys volleyball in Connecticut and help out with the USA Volleyball High-Performance program whenever I can. Speed and Energy are figured out using an average of all the known cartridges. 2022.3. Matrcula para el perodo Factory loads are usually loaded to leave the muzzle at 3,250 feet per second, offering the hunter a very flat bullet suitable for long range shots. Military and law enforcement departments adopted the cartridge for long-range use, particularly by snipers. Compare ballistics data on your favorite Winchester Ammunition rounds. At the same time, while the 7mm Rem Mag tops out with 175 grain bullets, the .300 Win Mag is capable of firing 200 grain, 208 grain, and 220 grain bullets with sectional densities of .301, .313, and .331 respectively. .300 Winchester Magnum (center) flanked by its parent cartridges: the, Comparison with other .30 Caliber Big Game Cartridges, Military and law enforcement applications. The .300 Win Mag is based off the parent case .375 H&H Magnum with a belted large The following ammunition cartridge ballistics information and chart can be used to approximately compare .270 Winchester vs .300 Winchester Magnum ammo rounds. Foundry Outdoors is your trusted home for buying archery, camping, fishing, hunting, shooting sports, and outdoor gear online. Hand WebThe .300 Winchester Magnum is quite often capable of driving 208-210 grain bullets at 2900fps, some rifles producing 2950-3000fps. Rules the Roost", "Top cartridges & bullets for black bears", Detail Specification Cartridge, .300 Winchester Magnum Match, MK 248 MOD 1 DODIC AB43, NSN 1305-01-568-7504 Revision A March 17, 2009, "U.S. Navy Small Arms Ammunition Advancements", "$49.9M U.S. Contract for 300 Winchester Magnum Ammo", "Advances in U.S. Sniping Ammunition: From Vietnam to Afghanistan by John Plaster", JBM Ballistics freeware online ballistic calculator, "Weapon Employment Zone (WEZ) Analysis of the XM-2010 Rifle With Various Ammunition Types by Bryan Litz, Applied Ballistics LLC", https://mittelkaliber.ch/wp-content/uploads/2021/02/BC_Vergleich_1.pdf, "Pentagon's Top Tester Gives Sniper Round Passing Grade", "Magnum force: Kimber's police tactical rifle now chambers the potent .300 Winchester Magnum". 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. //-->, Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. 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. This 300 WSM ballistics chart shows 150 grain Federal Premium Fusion Rifle Rounds. Keep in mind this is an approximation and although it is quite accurate it should never replace first-hand experience of shooting your specific firearm and ammunition to determine the bullet drop and windage at different ranges and conditions. Instead search for the bullet on the top left using the search box or browse by rifle, or pistol using the links from the main menu. This created the much criticized short neck of the .300 Winchester Magnum. In ballistics catalogs the point of maximum bullet rise is often called the mid-range trajectory, or sometimes the maximum ordinate. The most useful bullet weights for the .300 Winchester Magnum are those weighing between 150200 grains (9.713.0g). For the best experience on our site, be sure to turn on Javascript in your browser. Outside of education, research and coaching, I love traveling, photography, pottery, arts and crafts, and Ive recently picked up organic backyard gardening. [citation needed]. If you do not agree with these terms and conditions, please disconnect immediately from this website. [10] [19], The .300 Winchester Magnum cartridge is also very effective on dangerous class 3 game such as bear. Allowing a greater mid-range trajectory might result in shooting over an animal at an intermediate distance. Like the .300 H&H, the .300 Winchester is designed to headspace off the belt, but the clever reloader can adjust the cartridge to headspace off the shoulder. This means that it will be easier to hit targets at long distances using the .300 Win Mag. With the average load for the .300 Winchester Magnum, the recoil energy is roughly 30ft lbs. Wildcatters soon produced the .30-338 Winchester Magnum and Norma Projektilfabrik, who were by now manufacturing ammunition for Weatherby, took the standard length basic Weatherby brass and necked it down to .30 caliber (7.62mm) to form the .308 Norma Magnum. regulated countries are currently (2013) proof tested at 537.50MPa (77,958psi) PE piezo pressure.[11]. Although the 150 grain bullet may have a lower ballistic coefficient than heavier alternatives, this is compensated by its high velocities which extend its maximum point blank range to considerable distances making it suitable for light skinned big game such as deer and sheep, up to considerable distances. From 1956-1959, Winchester introduced three such cartridges: the .264 Winchester Magnum, .338 Winchester Magnum and .458 Winchester Magnum, all based on the shortened and blown out .375 H&H Magnum case. As illustrated in the chart, .270 Winchester rounds - on average - achieve a velocity of about3060 feet per second (fps) while .300 Winchester Magnum rounds travel at a velocity of 3030 fps. Sub 1 minute-of-angle (MOA) accuracy out to 1,000 yards (910m) is not unusual in precision-built rifles firing match-grade ammunition. 2001-2023 The Pain Reliever Corporation. [26], According to JBM Ballistics,[27] using the 0.310 G7 ballistic coefficient provided by Bryan Litz, and a Weapon Employment Zone (WEZ) analysis of the XM2010 rifle with various .300 Winchester Magnum ammunition types by Bryan Litz, the MK 248 MOD 1 .300 Winchester Magnum cartridge, when fired at its nominal muzzle velocity of 869m/s (2,850ft/s), should have 1,286 to 1,289m (1,406 to 1,410yd) supersonic range under International Standard Atmosphere conditions at sea level (air density = 1.225kg/m3). Cartridge Type: RifleHeight: 2.62"Width: 0.532"Average FPS: 3026Average Energy: 3517Average Gr: 173Recoil: 2.39Power Rank: 5.23 of 20. Please click the above links to take a look at all of the .270 Winchester and .300 Winchester Magnum ammo we have in stock and ready to ship, and let us know any parting thoughts in the comment section below. As such, the following is for comparative information purposes only and should not be used to make precise predictions of the trajectory, performance, or true ballistics of any particular .270 Winchester or .300 Winchester Magnum rounds for hunting, target shooting, plinking, or any other usage. Average Energy: 3610. According to the U.S. Navy this ammunition should increase the maximum effective range of .300 Winchester Magnum sniper rifle systems to 1,500 yards (1,370 m), decrease wind deflection on bullets in flight and use Hodgdon H1000, a reduced muzzle flash propellant that remains temperature stable across an operational temperature range of 25F to +165F (32C to 74C). slugs. While in hunting situations such accuracy is unnecessary, such accuracy does aid in the extending the range of the cartridge. WebAccording to QuickLoad, the case capacities of .300 Win Mag brass produced by four ammunition manufacturers measure as follows: Remington 88.0 grains of H 2 O (5.70 ml) Federal 92.0 grains of H 2 O (5.96 ml) Winchester 93.8 grains of H 2 O (6.08 ml) Norma 95.5 grains of H 2 O (6.19 ml) .300 Winchester Magnum SAAMI cartridge dimensions. Many chronic pain conditions are part of a larger syndrome such as fibromyalgia. The Weatherby cartridges of any given caliber followed a formula of improved design, which entailed blowing out the H&H Magnum parent case, thereby reducing case taper and increasing usable powder capacity. [7], The .300 Winchester Magnum was not an instant success, mainly due to competition from the comparable 7mm Remington Magnum cartridge introduced in 1962. [12] [13]. A maximum bullet rise of 1.5 inches is appropriate for shooting small animals, as they present a small target, particularly if head shots are necessary. Hornady Our next 300 WSM ballistics chart shows 165 grain InterLock American Whitetail rounds. WebThis compares favorably to 150 grain and 180 grain .308 bullets which have sectional densities of .226 and .271 respectively. (Commission Internationale Permanente pour l'Epreuve des Armes Feu Portatives) rulings the .300 Winchester Magnum can handle up to 430.00MPa (62,366psi) Pmax piezo pressure. WebBallistics Rifle Ballistics Ammo Description Velocity (fps) Energy (ft/lb) Trajectory Tables (inches) CARTRIDGE BULLET ITEM # MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. Almost no divergence between C.I.P. These bullets are generally loaded to reach muzzle velocities of 2700 to 2800 fps. Note:For an expanded version of this table showing more loads, including British, European, wildcat, obsolescent American and proprietary calibers, see the Expanded Rifle Trajectory Table. [12] Winchester's factory ammunition for the .300 Winchester Magnum is capable of 990m/s (3,260ft/s) with the 150-grain (9.7g) bullet and 910m/s (3,000ft/s) with the 12-gram (180gr) bullet, however old Western "Power Point" soft point can reach past 1,000 metres per second (3,400ft/s) with 9.7g (150gr) projectiles. The first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. We have a variety of deals on Rifle Ammo, Handgun Ammo, Shotgun Ammo & Rimfire Ammo, as well as ammo for target practice, plinking, hunting, or shooting competitions. This means that .300 Winchester Magnum chambered arms in C.I.P. This 56-inch kudu bull fell to a 180-grain Trophy Bonded Tip bullet while hunting with Kowas This 300 Winchester Magnum ballistics chart shows 215 grain Federal Premium Gold Medal Berger Open Tip Match rounds. The below 300 Win Mag ballistic chart shows 180 grain Federal Power-Shok Jacketed Soft Point Rounds. This 300 Winchester Mag ballistics chart shows 150 grain Federal Fusion Rifle Bonded Soft Point rounds. Interbond and A-Frame. The 165 grain bullet provides a higher ballistic coefficient than similarly shaped 150 grain bullet while maintaining a very high velocity which is translated into a flatter trajectory. So after sighting-in, always check your individual rifle at various ranges to see how close its trajectory comes to the published data. [34] However, by the time Winchester got around to designing their own .300, the .308 Norma Magnum and the .30-338 were already on the scene. In the table below I used the term "mid-range trajectory," abbreviated "MRT.". The .300 Winchester Magnum's broad availability in popular rifles such as the Winchester Model 70, Ruger M77, Remington Model 700 and Weatherby Mark V, together with the wide availability of ammunition from a number of manufacturers, made the cartridge a popular choice among hunters and competitive shooters the world over. SAAMI recommended a six-groove barrel with each groove being 2.8 millimetres (0.110in) wide. Recoil from the .300 Win Mag is noticeably higher than the well-known and popular .30-06 Springfield. Due to its worldwide ability and ballistic capability to shoot flat and carry its energy efficiently, due to its high sectional densities and ballistic coefficients, the cartridge is one of the more favored rounds for African plains game as well as big game hunting for different species and hunting conditions globally. Capable of stabilizing bullets weights ranging from 110 to 220 grains, the .300 Winchester Magnum happens to be a very versatile cartridge for different purposes and conditions including big game hunting, bench rest shooting and military applications. The amount of recoil the cartridge generates is a step up from the non-magnum .30 caliber (7.62mm) cartridges. . Looking at 300 Win Mag Ballistics. The larger dimensions of the .300 Win Mag compared to the .308 Norma Magnum and .30-338 Winchester Magnum cartridges ensures that rifles chambered in such rounds can readily be rechambered to the .300 Win Mag, though the shorter neck of the longer round necessitates comparable bullets must be seated more deeply in the case. Mag. The ammunition standards organizations SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) and C.I.P. (GR) MUZZLE 100yd200yd 300yd 400yd 500yd MUZZLE 100yd 200yd 300yd 400yd 500yd MUZZLE 100yd 200yd 300yd 400yd 500yd COEFFICIENT VOR-TX BB23R2 21520 55 TSX FB 1.5 200 3240 2774 2353 1970 1629 1343 1282 940 676 474 324 220 -1.5 1.5 0.0 -7.9 -24.8 -55.0 0.209 24 Barnes 55 JHP BT 1.5 200 3240 2820 This system maximizes the distance in which no "hold over" is necessary. Due to the wide selection of bullet weights and construction, the .300 Winchester Magnum may be used to hunt effectively everything from the dik-dik to the giant eland, being an excellent cartridge choice for all plains game under 680 kilograms (1,500lb). Web300 Winchester Magnum Load Data 125 Grain 150 - 155 Grain 165 - 168 Grain 175 - 180 Grain 190 Grain 200 Grain 210 Grain 220 Grain PRIVACY USE ORDER PROCESSING All sizes in inches (in) and millimeters (mm). You can find an email form and contact information here. If you do not have a Shooting Chronograph, I strongly suggest you purchase one. However, interest among hunters and shooters grew with time, and it gradually became the most popular of the magnum cartridges.[8]. Loaded with 180 grain bullets, the .300 Winchester magnum excels on large body weights, specifically on game weighing between 90 and 320kg (200-700lb). Again, the choice of bullet construction enables increased versatility. Loaded with 200 to 220 grain bullets, the .300 Winchester magnum can be put to use on large, heavy bodied game.