If we compare the Hornady bullet at these two muzzle velocities, we find that the 2700 fps bullet will drop below the sound barrier at just past 2200 yards. Barrett offers a similar alternative, the .416 Barrett, which is based on a shortened .50 BMG case necked down to .416 caliber (10.3 mm). TacFlow Academy used it in the video to demonstrate the .50 BMG’s “capabilities … [2] This record was surpassed in 2009 in Afghanistan by a British sniper, though using a .338 Lapua Magnum (8.58×70 mm) rifle.[3][4]. The inputs for both programs were the same, with a little juggling to get the initial velocity the same. Armor-piercing incendiary tracer (APIT) rounds were especially effective against aircraft, and the AP rounds and API rounds were excellent for destroying concrete bunkers, structures, and lighter AFVs. To be able to use this program with the 50 BMG case I extrapolated some information for IMR 5010 powder. With the exception of the scope, Cadex makes everything you see in the photos above. Moving back to the .50 BMG — last week our friends at Tactical Life got an exclusive look at the Super Bowl LIV police sniper training. [citation needed] Under STANAG 4383, it is a standard cartridge for NATO forces as well as many non-NATO countries. (The speed of sound is about 1120 fps at sea-level and 59 degrees F. It changes about 1 fps per degree, with the direction of the temperature change.) Posted February 28, 2017 in Ammunition, Photo Of The Day with 87 Comments Tags: .17 caliber, .50 BMG, reloading. The cartridge is also used by some hunters for taking game at extreme ranges; while the energy of the .50 BMG at close range is excessive for most game, at long ranges the velocity has dropped to levels that allow the taking of game animals without excessive damage to the animal. To illustrate my point, I ran those velocities through an external ballistics program that computes drop, drift, remaining velocities, and energies. The other option is to use a longer barrel (having no effect on chamber pressure), utilizing more of the powder gases. The primary military use of this round is in the Browning M2HB heavy machine gun. Some articles in other magazines have been published over the years about the equations. [17] Most of the instances of criminal activity cited in the Office of Special Investigations briefing involved the illegal possession of a .50 BMG rifle. The M15-series "push-through" links were used in the M85 machine gun. Then using an external ballistics program, we were able to show quantitively what that increased velocity meant to downrange performance, including decreased bullet drop, less wind drift, and higher velocity and energy. One is to burn more powder, but exceeding safe pressures soon puts the brakes on that. At 1500 yards the drift figures are 93.8 inches and 81 inches respectively. Velocity Changes Per Inch of Barrel Increase. A wide variety of ammunition is available, and the availability of match grade ammunition has increased the usefulness of .50 caliber rifles by allowing more accurate fire than lower quality rounds. .50 BMG cartridges are also produced commercially with a plethora of different bullets and to a number of different specifications. Normally this would not be undesirable, but muzzle brakes become less effective with lower pressures. This is the Ferret .50; a top-end attachment to an AR15 lower. Cadex Defence first announced its CDX-50 Tremor .50 BMG Sniper Rifle back in 2015. The concept of a .50 caliber machine gun was not an invention of this era; this caliber (.50) had been used in Maxim machine guns and in a number of manual rapid fire guns such as the original Gatling. Within the United Kingdom, it is legal to own a .50 BMG rifle with a section 1 Firearms Certificate.[18]. The .520 C7 is roughly equivalent to a C1 of 1.05 at these velocities. The .50 BMG round can produce between 10,000 and 15,000 foot pounds (between 14 and 18 kilojoules), depending on its powder and bullet type, as well as the rifle it was fired from. I highly recommend him and his product. Bill Davis adapted Homer Powley’s slide rule type “Computer for Handloaders” into an equation workable with other applications. Our neighbors to the north spelled defense with a “c,” so don’t correct us on social media that we spelled defense wrong. At 1000 yards, either load has plenty of energy, and actual drop isn’t as important as wind drift, in my opinion. For this model I’ll use the standard sea-level atmosphere and a temperature of 59 degrees F. Most shooters are going to be firing at higher altitudes, but this compares apples to apples. The 2700 fps load will drift 37.7 inches at 1000 yards, but the 2950 fps bullet will drift about 33 inches, or 4.7 inches less. One thing I miss about working behind the gun counter is the oddball stuff that comes in once in a while. Since the mid-1950s, some armored personnel carriers and utility vehicles have been made to withstand 12.7 mm machine gun fire, thus making it a much less flexible weapon. The .510 DTC Europ uses the same bullet, but has slightly different case dimensions. And as barrel length increases, muzzle pressures decrease. Excellent quality, and great customer service from Dave Moore of Spider Firearms. The oversized bullet is formed to the bore size upon firing, forming a tight seal and engaging the rifling, a mechanism which in firearms terms is known as engraving. In actual practice both by myself and others, the data produced by both programs has proven to be an accurate predictor of velocities. TacFlow Academy used it in the video to demonstrate the .50 BMG’s “capabilities when deploying for vehicular intrusion protection.”, Then, later in the week, someone brought the new Stormtrooper White model of the CDX-50 to our attention; it’s a thing of beauty. We will compare the figures for both velocities at 1000, 1500, 2000, and 2500 yards. Left to right, rear: Mk211, Spotter, Silver tip (Armor Piercing Incendiary), Blue tip (Incendiary), Black tip (Armor Piercing), SLAP-T, SLAP, Tracer, and Ball. We’re already looking to get one for some video testing. Instead, the M2HB Browning with its .50 caliber armor-piercing cartridges went on to function as an anti-aircraft and anti-vehicular machine gun, with a capability of completely perforating 0.875" (22.2 mm) of face-hardened armor steel plate at 100 yards (91 m), and 0.75" (19 mm) at 547 yards (500 m).[7]. To answer this question, I used two different internal ballistics programs that predict velocity as a function of barrel length. An upgraded variant of the M2 Browning machine gun used during World War II is still in use today. [1] The cartridge itself has been made in many variants: multiple generations of regular ball, tracer, armor piercing, incendiary, and saboted sub-caliber rounds. Improving upon the original, the all-new Remington 700 PCR Enhanced is certain to be... by Ballistic Staff / When launching a high ballistic coefficient bullet of 750 grains or so, that extra velocity translates into big increases in downrange energy and big decreases in drop and drift. As barrel length increases , the rate decreases. For those not familiar with LeDuc’s equation, I’ll go into a little detail, but not enough to bore, I hope. This weapon was used by other snipers, and eventually purpose-built sniper rifles were developed specifically for this round. Average chamber pressure in for this round as listed in TM43-0001-27[8] the U.S. Army Ammunition Data Sheets —Small Caliber Ammunition, not including plastic practice, short cased spotter, or proof/test loads, is 54,923 PSI (378 MPa or 3,787 bar). A skilled sniper can effectively neutralize an infantry unit by eliminating several targets (soldiers or equipment) without revealing his precise location. Bullet velocity is a very important ingredient of successful long-range shooting. Its range and accuracy, however, are superior to light machine guns when fixed on tripods, and it has not been replaced as the standard caliber for western vehicle mounted machine guns (Soviet and CIS armoured vehicles mount 12.7mm DShK, NSV, which are ballistically very similar to the .50 BMG, but 14.5 mm KPV machine guns have significantly superior armor penetration compared to any 12.7 mm round.
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