The .375 Cheyenne Tactical, or 375 CheyTac for short, is a sporting rifle cartridge. SBR ammunition is match-grade quality for 375 cheytac and is used by top level shooters like Team Smith & Wesson’s BJ Norris. Here’s what BJ had to say about SBR Ammunition:
Thank you for reading this post, don’t forget to subscribe!“Having fired well over 300,000 rounds during my career as a competitive pistol shooter, I have specific things I look for in ammunition. It must be accurate, consistent, and above all totally reliable. SBR Ammunition fits these descriptions perfectly. Developed and manufactured on state of the art equipment, each load goes through an exhaustive testing process before being packaged and marketed. Quality ammunition is a passion of Buddy Singleton and it shows up in every aspect of SBR’s products, from the LaserMatch Tracers to the Special-Application-Subsonic rounds designed specifically for suppressors, you can trust SBR to deliver their best in every box, I know I do.”
Brief history about 375 cheytac:
The .375 cheytac Tactical is based on the .400 Taylor Magnum, which itself is based on a modified .505 Gibbs, necked down to 0.408 inches (10.36 mm). The .505 Gibbs is an old English big game cartridge that was designed to accommodate 39,160 psi (270 MPa) pressure. One of the disadvantages to these old cartridge cases intended for firing cordite charges instead of modern smokeless powder is the thickness of the sidewall just forward to the web. During ignition, the cartridge’s base, forward to the bolt face, is not supported.
The .375 CheyTac cartridge has an interesting history rooted in the pursuit of extreme long-range precision shooting. Here’s a brief history of the .375 CheyTac:
1. Origin and Development: The .375 CheyTac cartridge was developed by CheyTac LLC, an American company founded by John D. Taylor in the early 2000s. The goal was to design a cartridge that could deliver exceptional long-range ballistics and accuracy for military, law enforcement, and civilian purposes.
2. The CheyTac Intervention Rifle: Alongside the development of the cartridge, CheyTac also created the CheyTac Intervention rifle platform. This precision rifle platform was specifically designed to optimize the ballistics and potential of the .375 CheyTac cartridge. It features a bullpup configuration for overall compactness, combined with a heavy barrel, adjustable stock, and high-quality optics.
3. Advancements in Ballistics: The .375 CheyTac cartridge was designed to push the limits of long-range shooting. It features a large case capacity and a bottleneck design, allowing for higher muzzle velocities and improved downrange performance. It is consistently praised for its excellent ballistic coefficients and minimal wind drift, which contribute to its long-range precision.
4. Military and Civilian Adoption: The .375 CheyTac gained attention and adoption primarily within the military and law enforcement communities as a cartridge capable of engaging targets at extreme distances. It offers enhanced penetration and accuracy, making it suitable for anti-personnel and anti-materiel applications. Civilians also started using the cartridge for long-range shooting competitions and personal long-range pursuits.
5. Record-Breaking Distances: The .375 CheyTac, paired with the CheyTac Intervention rifle, has set records in extreme long-range shooting. In 2009, a U.S. Army sniper using a .375 CheyTac rifle achieved a confirmed kill at a range of 2,657 yards (approximately 2,429 meters), setting a record at the time for the longest-range sniper kill shot in history.
The .375 CheyTac cartridge has been refined and developed further over the years, benefitting from ongoing research and advancements in precision shooting technology. It continues to be a sought-after cartridge for those looking to push the boundaries of long-range precision shooting.
what is a 375 cheytac:
The case is driven back against the bolt face which results in the stretching of the case, particularly the sidewall immediately forward of the web. When the sidewall resists the outward expansion against the chamber, the pressure stretches the case thereby increasing its length resulting in the sidewall becoming thinner at that stretch point.
375 CheyTac is a powerful and long-range rifle cartridge designed for extreme long-range precision shooting. Here’s an overview of the .375 CheyTac:
1. Cartridge Design: The .375 CheyTac cartridge was developed by CheyTac LLC, a firearms manufacturer specializing in long-range precision rifles and ammunition. It features a bottleneck design with a large case capacity, allowing for high muzzle velocities and excellent ballistic performance at extended ranges.
2. Ballistics and Performance: The .375 CheyTac cartridge is known for its exceptional long-range ballistics. It can deliver relatively flat trajectories and exhibits minimal wind drift due to its high muzzle velocity and high ballistic coefficient bullets. When paired with a capable rifle and skilled shooter, the .375 CheyTac is capable of engaging targets accurately at extreme distances.
3. Bullet Options: The .375 CheyTac typically utilizes large, heavy bullets for long-range shooting. Bullets in the range of 350 to 400 grains are common, with high ballistic coefficients to maximize downrange performance and minimize the effects of wind. These heavy bullets, combined with the cartridge’s high muzzle velocity, contribute to its long-range capabilities.
4. Applications: The .375 CheyTac is primarily used in precision rifles designed for long-range shooting and tactical applications. It is popular among competitive long-range shooters, military and law enforcement snipers, and civilian long-range enthusiasts. The cartridge has been used to achieve impressive accuracy and success at extreme distances, stretching well beyond 1,500 yards.
5. Rifle Availability: Rifles chambered in .375 CheyTac are typically custom-built or from specialized manufacturers focusing on long-range precision rifles. These rifles often feature heavy barrels, adjustable stocks, match-grade triggers, and high-quality optics to optimize performance at long ranges. Some well-known rifle manufacturers that offer rifles chambered in .375 CheyTac include CheyTac LLC, Accuracy International, and Zel Custom Manufacturing.
In the .375 cheytac cartridge casing design particular attention was directed toward thickening and metallurgically strengthening the case’s web and sidewall immediately forward to the web to accommodate high chamber pressures. In modern solidhead cases, the hardness of the brass is the major factor that determines a case’s pressure limit before undergoing plastic deformation.
Lapua Ltd. solved this problem when they used the .416 Rigby as the parental case to the .338 Lapua Magnum. They created a hardness distribution ranging from the head and web (hard) to the mouth (soft) as well as a strengthened (thicker) case web and sidewall immediately forward of the web. This method results in a very pressure resistant case.
This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.
Cartridge dimensions on .375 cheytac:
The .375 cheytac Tactical became officially registered by the Commission Internationale Permanente pour l’Epreuve des Armes à Feu Portatives (C.I.P.) on 15 May 2013 ending its status as a wildcat cartridge. In 2020 it was deregistered by the C.I.P.
The .408 Cheyenne Tactical has 10.32 ml (159 grains H2O) cartridge case capacity.
375 cheytac ballistics Tactical maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm).
Americans would define the shoulder angle at alpha/2 ≈ 22.13 degrees. The common rifling twist rate for this cartridge is 330.2 mm (1 in 13 in), 8 grooves, Ø lands = 10.16 mm (0.400 in), Ø grooves = 10.36 mm (0.408 in), land width = 2.57 mm (0.1 in) and the primer type is large rifle.
According to the official C.I.P. (Commission Internationale Permanente pour l’Epreuve des Armes à Feu Portatives) rulings the .408 Cheyenne Tactical can handle up to 440.00 MPa (63,817 psi) Pmax piezo pressure. In C.I.P. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. pressure to certify for sale to consumers. This means that .408 Cheyenne Tactical chambered arms in C.I.P. regulated countries are currently (2016) proof tested at 550.00 MPa (79,771 psi) PE piezo pressure.
WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.
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