This results in bullet that is far and away less accurate, doesn't go nearly as far, and "creates lower pressures which. According to the solicitation, subsonic bullets "experience significant accuracy problems due to excessive deviations in velocity." The gunpowder (or propellant charge) for a subsonic bullet has to be used in smaller quantities than for a normal bullet, and the bullet itself has to be heavier. Breaking the sound barrier also pretty much negates the use of a sound suppressor, or "silencer," which the special forces would likely want to use against militants in Afghanistan and around the world.įor one, to keep a bullet from breaking the sound barrier - 1,100 feet per second at sea level - requires several trade-offs at higher calibers. 338 calibers, the bullets will travel at low enough velocities to avoid breaking the sound barrier, thus creating no "crack" noise. In theory, and for rifles in the 5.56, 7.62 and. The reason, according to the solicitation, is to " provide superior covert and stealth capabilities" for not only the military, but police forces and the Department of Homeland Security. In its latest round of small-business solicitations, the Pentagon's Special Operations Command, or SOCOM, is seeking out subsonic ammunition. Now the commandos want to be sneakier with slower, quieter bullets. Most bullets make small sonic booms when flying through the air, which to our ears sound like a loud, distinct " crack!" For the Pentagon's special forces, that makes it hard to be sneaky about what they're shooting.
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