Does bullet grain affect velocity?
The five shot average muzzle velocity for the heavier 147 grain bullet was just under 940 feet per second. That is a muzzle energy of 288 foot pounds….Field Test: HST Velocity & Energy.
| 124 Grain HST | 147 Grain HST | |
|---|---|---|
| Shot 5 | 1073 fps | 935 fps |
Does higher grain mean more velocity?
Conclusion: Bullet Grain Lighter weight generally means more speed and distance, but also more recoil and less power at the target. Lighter bullets are good for competition and long-range shooting. Heavier weight generally means more effectiveness, making them excellent for defense, large game and combat.
How powerful is a 20mm round?
At approximately 48,000 ft⋅lbf (65,000 J) of kinetic energy, the 20mm round, as fired out of the Anzio rifle, has nearly four times the energy of the . 600 Nitro Express, the second most powerful African big game rifle cartridge, has around 8,200 ft⋅lbf (11,100 J) of kinetic energy.
Does velocity matter more than size of a bullet?
Does speed or size of a bullet matter more? – Quora. They both matter, but an increase in speed will result in more kinetic energy than increasing the size. Double the mass, double the energy. Double the velocity, quadruple the energy.
What’s more important velocity or energy?
Although both mass and velocity contribute to the muzzle energy, the muzzle energy is proportional to the mass while proportional to the square of the velocity. The velocity of the bullet is a more important determinant of muzzle energy.
Why do higher grain bullets travel slower?
Grains are a measure of mass, of course, meaning a higher grain bullet is heavier. Given the same propellant force, a lighter object will always travel farther (and faster) than a heavier one.
How much damage does a 20mm do?
Yet a 20mm round exerts 4 times as much force, meaning a 20mm exerts 53,940 foot pounds of force. There is a reason why 20mm ammunition is meant to tear through armored vehicles and vessels.
Does velocity affect accuracy?
As the bullet loses velocity, the transition from supersonic to subsonic can destabilise the projectile reducing the accuracy of its trajectory. This makes them more accurate at shorter distances because they aren’t affected by the inherent instability resulting from supersonic rounds returning to subsonic velocity.