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The "L/56" in the designation is descriptor of barrel length; the ratio of the length of the barrel in proportion to the width of the bore. The designation "L/56" means the barrel is 56 times 88 mm - about 4.9 m (16 ft 1 in). The longer the tube is in relation to its bore, the higher the muzzle velocity it can generate on fixed charge. A longer ...
Airsoft is safe when played with proper protective gear. Most airsoft guns on the market are usually below 350 ft/s (110 m/s), but projectiles expelled from any type of airsoft gun can travel as slow as 65 ft/s (20 m/s) to more than 700 ft/s (210 m/s) and are capable of breaking skin at 350–400 ft/s (110–120 m/s).
The ballistics of spring- or electrically powered airsoft guns differ from real firearms in that a longer barrel will not always result in better accuracy. [citation needed] The "sweet spot" for barrel length in a spring/electric powered airsoft gun is around 450 mm (18 in), beyond which added barrel length will not improve accuracy.
So, the muzzle velocity of a 2-inch (51 mm) barrel is less than that of a 4-inch (100 mm) barrel, which is less than that of a 6-inch (150 mm) barrel. Large naval guns will have high length-to-diameter ratios, ranging between 38:1 to 50:1. This length ratio maximizes the projectile velocity.
Muzzle energy is dependent upon the factors previously listed, and velocity is highly variable depending upon the length of the barrel a projectile is fired from. [2] Also the muzzle energy is only an upper limit for how much energy is transmitted to the target, and the effects of a ballistic trauma depend on several other factors as well.
Nevertheless, there is significantly more to accuracy and cartridge lethality than the length and diameter of the case, and the 7.62×51mm NATO has a smaller case capacity than the .30-06 Springfield, [17] reducing the amount of propellant that can be used, directly reducing the bullet weight and muzzle velocity combination that contributes to ...
If the barrel is unsuitable and relining is not an option, then an aftermarket or custom barrel is the best solution. However, if the bore is good, then there are a number of operations that can be done to the barrel to improve upon its accuracy.
The barrel length is reduced to 310 mm. The 8 inch twist rate of the barrel is especially adapted to stabilize the long heavy projectiles used in subsonic ammunition. The propellant charge of subsonic ammunition is reduced to keep the bullet velocity (300–320 m/s (980–1,050 ft/s) below the speed of sound (~ 340 m/s (1,100 ft/s)).