Depends on the range at which the rifle is zeroed.
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Depends on the .22 cartridge, what weight bullet, and what it is fired in. Some .22s travel slower than the speed of sound (about 1100 fps) some high velocity 22 LR cartridges fired from a rifle reach muzzle velocity of 1750 fps with a 30 grain bullet. The .22 Magnum may reach 2200 fps with the 30 grain bullet.
The standard AK47 fires a 123 grain bullet at 2,400 feet per second. This produces 1,600 ft lbs of energy.
Some .40 caliber bullets are supersonic and some are not; it depends on the load. Generally lighter bullets (155 grain or less) will be supersonic, and heavier bullets (165 grain or more) will be subsonic, although there are a couple 165 grain bullets out there with advertised velocities about equal to the speed of sound. No matter what bullet you purchase, if you feel like subsonic/supersonic is a difference-maker to you, then check the manufacturer's specifications on the ammunition you're purchasing.
Grain refers to the weight of the bullet when measured on a powder scale.
The weight of the bullet. They can range from 25 grain (Small rifles) to over 400 grain for big game.
Grains refer to the bullets weight. A 40 grain bullet weighs four grains more than a 36 grain bullet. It's a little heavier, that's all.
Grain refers to the weight of the bullet when measured on a powder scale.
A lighter bullet will strike the target higher,due to its lighter weight which allows the bullet to be pushed faster(in feet per second) then the heavier bullet with the same weight of powder in the case.
The velocity of a bullet coming down from altitude is the terminal velocity of the bullet fired. Since not all bullets are equal in mass, it would depend on the grain (weight) of the bullet fired, the caliber of the bullet, and the charge behind the bullet (which would determine the highest possible altitude it could reach). To determine the terminal velocity of any bullet, you must first know these variables and plug in those variables to the equation below: That is, * Vt = terminal velocity * m= mass of the bullet * g = gravitational acceleration * Cd = drag coefficient (wind resistance applied to the bullet as it falls) * ? = denisty of the medium through which the bullet is falling (the atmosphere) * A = projected area of the bullet (which can get complicated due to the shape of the ball). Essentially, the following is true: any bullet fired straight upward is not only potentially but very likely as deadly to anyone it might strike when it lands as if that same bullet were fired directly at that person.
The reference to grains means the weight of the bullet.
The heaviest bullet in my reloading manuals for the .380 is a 120 grain cast bullet.