© Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. By 500 yards though, the ballistically superior 6.5mm bullets help narrow that gap down to 108 foot pounds with the E-Tip and just 38 foot pounds of energy with the ELD-X. Muzzle Energy is useful in comparing cartridges, calculating recoil, … The equation; half mass multiplied by the velocity squared may be that of the classic statement for kinetic energy, but it is not the equation used. Although very similar to the military 7.62×51mm NATO specifications, the .308 Winchester cartridge is not identical, and there are special considerations that may apply when mixing these cartridges with 7.62×51mm NATO, and .308 Winchester chambered arms. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. If the mass, m, is in grams and the speed, v, is in kilometres per second, the calculated muzzle energy, E k, will be in kilojoules. Also, the numerical coefficient of 32.163 is normally used in the United States as the dimensional constant for all advertised muzzle energies. Kinetic energy is energy of motion and applies to many disciplines within physics and engineering. True .308 Winchester and .45-70 Government ballistics information can vary widely from the displayed information, and it is important to understand that the particular characteristics of a given round can make a substantive difference in its true performance. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. The table above shows why the 308 Winchester is popular among big-game hunters and those who enter the competitive shooting sport. As a rule of thumb, when it comes to hunting, muzzle energy is what many hunters look at when deciding on what caliber of firearm / ammunition to select. In doing so, this gives the pound, foot, second and pound force its correct value. Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle of a firearm. The heavier rounds like 185 gr (12 g) Lapua Mega JSP will be lower at 2,510 fps, and the lighter 125 gr (8 g) Spitzer will be around 3100 fps. A 180 grain bullet fired from .357 magnum handgun can achieve a muzzle energy of 580 foot-pounds. Winchester branded the cartridge and introduced it to the commercial hunting market as the .308 Winchester. What’s A Typical .308 Winchester Muzzle Velocity, Federal Premium Sierra Match King Gold Medal. One way to think about this is as such: a foot-pound is a unit of energy equal to the amount of energy required to raise a weight of one pound a distance of one foot. Offered by many companies as either a single shot or a fast handling lever, Comments have to be approved before showing up, © 2020 Foundry Outdoors - All Rights Reserved, Product successfully added to your Shopping Cart, 223 WSSM Winchester Super Short Magnum Ammo, 243 WSSM Winchester Super Short Magnum Ammo, 25 WSSM Winchester Super Short Magnum Ammo, 300 RSAUM Remington Short Action Ultra Magnum Ammo, 7mm RSAUM Remington Short Action Ultra Magnum Ammo, .308 Winchester vs .45-70 Government Ammo Comparison - Ballistics Info & Chart. Red Oak, White, or Chestnut for Deer Herd? "The 20th Century's Top Rifle Cartridge,". The Foot-pound force is a quotient of half mass time velocity squared divided by the dimensional constant. The decision for which round is better for a given application should be made with complete information, and this article simply serves as a comparative guide, not the final say. As with all .308 180 grain loads, a low muzzle velocity helps to minimize any undesirable bullet deformation during penetration. While the.308 produces slightly more recoil energy (21.7ft.lb compared to 19.6ft.lb), it probably isn’t anything significant, especially to more experienced shooters. 1. When we change to English units of measure here on Earth were pull the numerical values for SI units of measure below the divisor bar. , North American SAAMI maximum pressure for the 308 Winchester is 427.47 MPa (62,000 psi).. Also, not only will the lead ball possess the same energy, but it will possess the same ability to penetration. While the above list mentions some averages, there is wide variation in commercial ammunition. Take your favorite fandoms with you and never miss a beat. Proponents of the hydrostatic shock theory contend that the .308 Winchester has sufficient energy to impart hydrostatic shock to living targets when rapidly expanding bullets deliver a high rate of energy transfer. The later T65 iterations were lengthened compared to the original T65 case and provided a ballistic performance roughly equal to the U.S. military .30-06 Springfield service cartridge. The measurement for translational kinetic energy is called, "Foot-Pound force". One way to think about this is as such: a foot-pound is a unit of energy equal to the amount of energy required to … To minimize the errors, instead of using different firearms, he made a custom firearm and cut the barrel 1 inch at a time when conducting the test. We always assume the kilogram, meter and second are there because we know the bullet weight (grams) and velocity (meter per second). As illustrated in the chart, .308 Winchester rounds - on average - achieve a velocity of about 2680 feet per second (fps) while .45-70 Government rounds travel at a velocity of 1680 fps. The .308 Winchester is a smokeless powder rimless bottlenecked rifle cartridge. If the mass, m, is in grams and the speed, v, is in kilometres per second, the calculated muzzle energy, Ek, will be in kilojoules. This “2” represents the word “half” in the classic kinetic energy statement. It is then left up to an individual to make their own conclusion on the effectiveness or potential of a bullet/cartridge combination within a specific gun by including all four factors. The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of .409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. cartridge dimensions. Sig Sauer Romeo 5 Review: We’ve Set Our Sights On It. i am debating on getting a .35 whelen or a 45-70. Courtney A, Courtney M: Links between traumatic brain injury and ballistic pressure waves originating in the thoracic cavity and extremities. In 2014, the rimless 45 Raptor was introduced to provide a big bore cartridge for the AR-10 by combining the .308 Winchester with the .460 S&W Magnum. It dates back to the 1950s, but an earlier .300 Savage inspires its design. The original barrel length was 28 inches, and the final barrel length was 16.5 inches. The 45-70 is a diverse round that has many applications and can be reloaded with the same brass time and again. There are four factors in calculating applied energy: projectile energy; projectile construction; projectile sectional density and target construction. It has gained popularity in many countries as an exceptional cartridge for game in the medium- to large-sized class. The average muzzle velocity of a.308 Winchester round is around 2750 fps (feet per second). Brain Injury 21(7): 657-662, 2007. It is often used as a rough indication of the destructive potential of a given firearm or load. The following ammunition cartridge ballistics information and chart can be used to approximately compare .308 Winchester vs .45-70 Government ammo rounds. A lot of it is attributed to the fact that most people use it, and it’s readily available. However, in this case if the bullet is bigger or smaller in caliber then the penetration will be different due to the change in sectional density. Since then, the .308 Winchester has become the most popular short-action, big-game hunting cartridge worldwide. The difference is throwing and shooting are artificial means of accelerating the lead ball where as dropping it is a natural means of accelerating it. In most cases, a lighter bullet is a faster bullet and the round will have the greater muzzle velocity. By pulling the dimensional constant below the divisor bar you can also calculate the muzzle energy and recoil energy of your gun on any moon, planet or star within the known universe.