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.17 HMR
.17 Hornady Magnum Rimfire, commonly known as the .17 HMR, is a rimfire rifle cartridge developed by Hornady in 2002. It was developed by necking down a .22 Winchester Magnum Rimfire case to take a .17 caliber (4.5mm) projectile. Commonly loaded with a 17 grain (1.1 g) projectile, it can deliver muzzle velocities in excess of 775 m/s (2,650 ft/s). Development The .17 HMR round is similar to rounds developed by dedicated rimfire wildcatters who worked to create a rimfire cartridge with an exceptionally flat trajectory. These wildcatters were seeking to match the ballistics of the obsolete 5mm Remington Rimfire Magnum, which was made from 1970 to 1974, and was to that point the fastest rimfire cartridge ever produced. With 5 mm diameter barrels and bullets being virtually unavailable at the time (the 5mm RMR was the last commercial 5 mm round until the 2004 release of the centerfire .204 Ruger), the commercially available .17 caliber became their bullet of choice. The .22 W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Plastic-tipped Bullet
A plastic-tipped bullet is a type of hollow-point bullet tipped with a nose cone made of synthetic polymer to give it a pointed spitzer-like shape. The plastic tip drives into the hollow point upon impact, causing the bullet to expand, which increases lethality. These bullets are typically designed for rifles and single-shot handguns, improving aerodynamics for longer, more accurate flights. Some companies also produce such bullets for semi-automatic pistols to improve ammunition feeding and prevent jams. The term "Ballistic Tip" is trademarked by Nosler, with other companies like Hornady and Sierra Bullets also producing similar bullets. Design and use The bullets consist of a fairly normal hollow-point bullet with the frontal cavity filled in by hard plastic, which is molded into a streamlined shape. Most tips are made of polyoxymethylene, although some manufacturers have used polyester urethane- methylenebis(phenylisocyanate) copolymer. Upon impact, the plastic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Trajectory
A trajectory or flight path is the path that an object with mass in motion follows through space as a function of time. In classical mechanics, a trajectory is defined by Hamiltonian mechanics via canonical coordinates; hence, a complete trajectory is defined by position and momentum, simultaneously. The mass might be a projectile or a satellite. For example, it can be an orbit — the path of a planet, asteroid, or comet as it travels around a central mass. In control theory, a trajectory is a time-ordered set of states of a dynamical system (see e.g. Poincaré map). In discrete mathematics, a trajectory is a sequence (f^k(x))_ of values calculated by the iterated application of a mapping f to an element x of its source. Physics of trajectories A familiar example of a trajectory is the path of a projectile, such as a thrown ball or rock. In a significantly simplified model, the object moves only under the influence of a uniform gravitational force field. This can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Terminal Ballistics
Terminal ballistics is a sub-field of ballistics concerned with the behavior and effects of a projectile when it hits and transfers its energy to a target. This field is usually cited in forensic ballistics. Bullet design (as well as the velocity of impact) largely determines the effectiveness of penetration. General The concept of terminal ballistics can be applied to any projectile striking a target. Much of the topic specifically regards the effects of small arms fire striking live targets, and a projectile's ability to incapacitate or eliminate a target. Common factors include bullet mass, composition, velocity, and shape. Firearm projectiles Class of projectile Projectiles are primarily designed for compatibility with the constraints of the device used to launch them, and secondarily according to some balance of logistical practicality, practicable accuracy, and terminal effect. Prior to the development of rifling, the majority of projectiles purpose-built for shooting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Full Metal Jacket Bullet
A full metal jacket (FMJ) bullet is a small-arms projectile consisting of a soft core (often lead) encased in an outer shell ("jacket") of harder metal, such as gilding metal, cupronickel, or, less commonly, a steel alloy. A bullet jacket usually allows higher muzzle velocity, muzzle velocities than bare lead without depositing significant amounts of metal in the Gun barrel, bore. It also prevents damage to bores from hard steel or armour-piercing ammunition, armor-piercing core materials. History Despite a widespread belief that the full metal jacket bullet was invented ca. 1882 by Swiss Colonel Eduard Rubin while he was working for the Swiss Federal Ammunition Factory and Research Center, in fact it was known already in the 1880s that the actual inventor was Prussian Major (later Lt.-Col.) (1835-1885), who came up with the idea either in 1875 or 1876. The use of full metal jacketing in military ammunition came about in part because of the need for improved feeding charac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Soft Point Bullet
A soft-point bullet (SP), also known as a soft-nosed bullet, is a jacketed expanding bullet with a soft metal core enclosed by a stronger metal jacket left open at the forward tip. A soft-point bullet is intended to expand upon striking flesh to cause a wound diameter greater than the bullet diameter. Jacketed soft point bullets are usually abbreviated ''JSP'' in the ammunition and reloading industry. The use of soft-point bullets in warfare is a violation of the Hague Convention of 1899, declaration IV, 3. Evolution Lead-alloy bullets used with gunpowder firearms were unsatisfactory at the bullet velocities available from rifles loaded with nitrocellulose propellants such as cordite. By the late 19th century, lead-alloy bullets were being enclosed within a jacket of stronger mild steel or copper alloyed with nickel or zinc to reliably impart stabilizing rotation in rifled barrels. The lead-alloy core was swaged into a cup of the stronger metal covering the front and sides o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Hollow Point Bullet
A hollow-point bullet is a type of expanding bullet which expands on impact with a soft target, transferring more or all of the projectile's energy into the target over a shorter distance. Hollow-point bullets are used for controlled penetration, where overpenetration could cause collateral damage (such as aboard an aircraft). In target shooting, they are used for greater accuracy due to the larger meplat. They are more accurate and predictable compared to pointed bullets which, despite having a higher ballistic coefficient (BC), are more sensitive to bullet harmonic characteristics and wind deflection. Plastic-tipped bullets are a type of (rifle) bullet meant to confer the aerodynamic advantage of the Spitzer bullet (for example, see very-low-drag bullet) and the stopping power of hollow-point bullets. Gunshot wounds from hollow-point bullets can be very painful; due to this, they have been banned from use in wartime. They may leave fragments difficult to remo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Plastic-tipped Bullet
A plastic-tipped bullet is a type of hollow-point bullet tipped with a nose cone made of synthetic polymer to give it a pointed spitzer-like shape. The plastic tip drives into the hollow point upon impact, causing the bullet to expand, which increases lethality. These bullets are typically designed for rifles and single-shot handguns, improving aerodynamics for longer, more accurate flights. Some companies also produce such bullets for semi-automatic pistols to improve ammunition feeding and prevent jams. The term "Ballistic Tip" is trademarked by Nosler, with other companies like Hornady and Sierra Bullets also producing similar bullets. Design and use The bullets consist of a fairly normal hollow-point bullet with the frontal cavity filled in by hard plastic, which is molded into a streamlined shape. Most tips are made of polyoxymethylene, although some manufacturers have used polyester urethane- methylenebis(phenylisocyanate) copolymer. Upon impact, the plastic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Centerfire
Two rounds of .357 Magnum, a centerfire cartridge; notice the circular primer in the center A center-fire (or centerfire) is a type of metallic cartridge used in firearms, where the primer is located at the center of the base of its casing (i.e. "case head"). Unlike rimfire cartridges, the centerfire primer is typically a separate component seated into a recessed cavity (known as the ''primer pocket'') in the case head and is replaceable by reloading the cartridge. Centerfire cartridges have supplanted the rimfire cartridge, with the exception of a few small calibers. The majority of today's handguns, rifles, and shotguns use centerfire ammunition, with the exception of some .17 caliber, .20 caliber, and .22 caliber rimfire handgun and rifle cartridges, a few small-bore/gauge shotgun shells (intended mainly for use in pest control), and a handful of antiquated rimfire and pinfire cartridges for various firearm actions. History An early form of centerfire ammunitio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Rifle
A rifle is a long gun, long-barreled firearm designed for accurate shooting and higher stopping power, with a gun barrel, barrel that has a helical or spiralling pattern of grooves (rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with both hands and braced firmly against the shooter's shoulder via a buttstock for stability during shooting. Rifles are used in warfare, law enforcement, hunting and shooting sports, target shooting sports. The invention of rifling separated such firearms from the earlier smoothbore weapons (e.g., arquebuses, muskets, and other long guns), greatly elevating their accuracy and general effectiveness. The raised areas of a barrel's rifling are called ''lands''; they make contact with and exert torque on the projectile as it moves down the bore, imparting a spin. When the projectile leaves the barrel, this spin persists and lends gyroscopic stability to the projectile due to conservatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sturm, Ruger & Co
Sturm, Ruger & Company, Inc., better known by the shortened name Ruger, is an American firearm manufacturing company based in Southport, Connecticut, with production facilities also in Newport, New Hampshire; Mayodan, North Carolina; and Prescott, Arizona. The company was founded in 1949 by Alexander McCormick Sturm and William B. Ruger and has been publicly traded since 1969. Ruger produces bolt-action, semi-automatic, and single-shot rifles, semi-automatic pistols, and single- and double-action revolvers. According to the ATF statistics for 2022, Ruger is the largest firearm manufacturer in the United States, surpassing Smith & Wesson. History Sturm, Ruger & Company was founded by William B. Ruger and Alexander McCormick Sturm in 1949 in a small rented machine shop in Southport, Connecticut. Just prior to their partnership, Bill Ruger had successfully duplicated two Japanese "baby" Nambu pistols in his garage, from a captured Nambu that he acquired from a r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Marlin Firearms
Marlin Firearms is an American firearms manufacturer, manufacturer of semi-automatic firearm, semi-automatic, lever-action and bolt-action rifles. In the past the company (based in Madison, North Carolina and formerly based in North Haven, Connecticut) made shotguns, derringers, revolvers, and razor blades. Marlin owned the firearm manufacturer H&R Firearms. In 2007, Remington Arms, part of the Remington Outdoor Company, acquired Marlin Firearms. Remington produced Marlin-brand firearms at its Kentucky and New York manufacturing facilities. In 2020, Sturm, Ruger & Co. bought the Marlin business from bankrupt Remington Outdoor Company. History Marlin Firearms was founded in 1872 by John Mahlon Marlin, John Marlin. Marlin produced a large assortment of firearms such as lever-action rifles, pump-action shotguns, and single-shot rifles. Marlin was considered the main competitor to Winchester. In World War I Marlin became one of the largest machine gun producers in the world for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
