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Projectiles are described by a ballistic coefficient, or BC, which combines the air resistance of the bullet shape (the drag coefficient) and its sectional density (a function of mass and bullet diameter). The deceleration due to drag that a projectile with mass m, velocity v, and diameter d will experience is proportional to 1/BC, 1/m, v² and ...
The standard M80 ball round weighs 147 gr and from an M14 rifle and M60 machine gun has a muzzle velocity 200 ft/s (61 m/s) faster than the M118LR 175 gr sniping round. However, the M80 drops to subsonic velocity around 900 m (984 yd), while the initially slower M118LR is supersonic out to 1,000 m (1,094 yd) due to its low-drag bullet. [12]
Land diameter.315 in (8.0 mm) Neck diameter ... Bullet mass/type Velocity Energy; 165 gr (11 g) ... The bullet was a handloaded 170 grain Hornady Jacketed soft point.
Bullet diameter.243 in (6.2 mm) Land diameter.237 in (6.0 mm) Neck diameter ... together with minimum levels of muzzle velocity and bullet energy, ...
(also 223–06) - necked down to accept a .224 caliber bullet - The 22-06 uses the same caliber bullet as the 223 Remington. This round is frequently used for varmint hunting, as, a long range, high-velocity, and flat shooting round, in chambering suitable for that sport.
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.
The bullet was basically the same as used in the S.m.K. ammunition but combined with a tracer that burned for 800 to 1,000 m (875 to 1,094 yd). It had a bullet weight of 10.00 g (154.3 gr) and a muzzle velocity of 810 m/s (2,657 ft/s) and an operating pressure of 280 MPa (40,611 psi).
Bullet diameter.452 in (11.5 mm) Land diameter.442 in (11.2 mm) ... Due to its larger size and slower velocity it creates a larger wound channel and transfers more ...