With modern powders not very much. In the past, the longer barrel gave the powder a chance to burn more thoroughly.
To a point, the velocity of the bullet will increase. However, at some point, the gasses driving the bullet have maxed out, and beyond that point, the bullet will begin to slow from friction with the barrel. For a .22 LR cartridge, that length is about 12 inches. Larger cartridges have a greater "Max velocity" length, but there is a point of no more gain, and the start of loss of velocity.
Yes. The velocity of all common cartridges changes with the length of the barrel. In the case of a .22 LR, they develop the maximum velocity between 12 and 16 inches of barrel. Shorter than that, the gasses from the gunpowder have not accelerated the bullet as much as they can. Longer than that, gasses reached their max acceleration, and the bullet is now slowing from friction in the barrel.
As per Einstein's theory of relativity as velocity of the rod increases then its length would be shortened by a factor ./ 1 - (v/c)^2 where v is the velocity of the rod and c the velocity of light. This is known as Lorentz Fitzerald contraction.
Acceleration is any change in velocity during a length of time.
As we know , resistance(R) is directly proportional to length(L) of conductor and resistence(R) is inversely proportional to current (I) and I=nAqv (v is drift velocity) So , if we decrease the length of the conductor , resistance of the conductor will decrease and current(I) will increase and drift velocity of free electrons will increase . And as we know resistance and temperature have direct relation so , by decreasing the temperature resistence will decrease and current will increase . So drift velocity will increase .
Energy is dependent upon velocity. Barrel length can have both a detrimental as well as an enhancing effect on velocity. If both firearms have the same barrel length and type of rifling - velocity will be close to the same and energy will therefore also be close to the same. This assumes identical cartridges.
18" for shotguns
30 inches. A longer barrel gives you better accuracy.
Need to know condition, barrel length and choke
To a point, the velocity of the bullet will increase. However, at some point, the gasses driving the bullet have maxed out, and beyond that point, the bullet will begin to slow from friction with the barrel. For a .22 LR cartridge, that length is about 12 inches. Larger cartridges have a greater "Max velocity" length, but there is a point of no more gain, and the start of loss of velocity.
Small changes in length have little effect. Large changes have more effect. Longer barrels in hunting shotguns are used to control the swing of the gun while tracking birds rather than effective range considerations.
Federal law requires that a shotgun have a minimum barrel length of 18" and a minimum overall length of 28". Colorado law is not more restrictive.
It may or may not depending on the projectile and velocity.
Yes. The velocity of all common cartridges changes with the length of the barrel. In the case of a .22 LR, they develop the maximum velocity between 12 and 16 inches of barrel. Shorter than that, the gasses from the gunpowder have not accelerated the bullet as much as they can. Longer than that, gasses reached their max acceleration, and the bullet is now slowing from friction in the barrel.
Yes, but there is a point where the round reaches the max velocity it can achieve, and any extra barrel length past that point is a bit useless.
In US law, there is no legal minimum for a handgun barrel- I have a Sedgely Baby Hammerless .22 Revolver with a 1 inch barrel. There IS a legal minimum (16") for rifles and shotguns (18")
Too broad a question. Muzzle velocity is determined by the specific cartridge, barrel length, barrel tolerances, etc.