Originally posted by AThousandYoungI think a longer gun allows the bullet to pick up greater speed, obtain its spin with less friction, and come out of the barrel with a more consistent direction.
What advantage would a longer gun have over such a system?
Originally posted by AThousandYoungThe answer is no, the short barrel means the bullet will start to wobble after it leaves the barrel because the rifling inside the barrel won't have the same number of turns as a longer barrel and therefore the bullet will not be spinning as fast as a longer barrel. The faster the bullet spins, the less tendency there will be for wobble, because of gyroscope effect. Wobble in this case more precisely means 'precession' around the line of flight.
Could you take a carbine or pistol and give it a front sight post that can extend past the barrel to give a longer sight plane for the iron sights? What advantage would a longer gun have over such a system?
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Originally posted by googlefudgeAnd a laser sight would have to have the beam adjusted for the distance of the shot.
The answer is it depends... which the greater factor is in the accuracy of the shot...
Over short distances it is typically the aim of the person shooting the gun rather than the inaccuracy of the round itself.
As demonstrated in an episode of myth busters where they tried to curve shots like in the film 'Wanted',
despite mutilating the rounds to ...[text shortened]...
If you need that kind of accuracy your better off with a WYSIWYG laser sight and/or a rifle.
Originally posted by sonhouseof course...
And a laser sight would have to have the beam adjusted for the distance of the shot.
The bullet drifts down because of gravity so the further the shot, the more downwards the aim of the laser beam if you want to know where the bullet will hit as the bullet gets further and further away. And of course all that would depend on the velocity of the bullet, t ...[text shortened]... know if that has been done for home use. That does not take into account windage, only gravity.
Originally posted by googlefudgeMaking up for inaccuracy by firing 800 rounds per minute, maybe 30 rounds or so, making it more like a serial shotgun.....
However on the kind of distance scale where you stand a hope in hell of hitting the side of a barn with a handgun,
The deviation from a straight line by either gravity or wind deflection is negligible.
Over short ranges those factors are only relevant if you're a marksman trying to score a perfect 100 on a target shoot...
In whic ...[text shortened]... l long barrel machine gun, in semi-automatic mode, would qualify as a rifle for these purposes.
Originally posted by AThousandYoungYou mean do less damage to the barrel itself? I have to admit other then the physics of the flight path I am pretty ignorant of the workings of rifles and pistols.
Part of it has to do with having enough room for the powder to finish burning. That's why M4 carbines have -1 damage (I mean do less damage than full length M16s).
Originally posted by googlefudgeYou sound like quite an expert on the subject. My only experience shooting was when I almost offed my old man hunting for quail in California I was 13 at the time. I tended to not like guns after that. He was killed by a gun in a robbery much later so you can see how I feel about guns in general.
There is an optimum length of barrel for maximum muzzle velocity
(and hence accuracy, as the higher the velocity the higher the potential accuracy)
This optimum length is the length at which the the diminishing pressure from the explosive charge behind the projectile round
is balanced by the increasing pressure in front combined with the friction muzzle velocities, and thus ranges can be achieved than with a traditional projectile weapon.
Originally posted by sonhouseNo I mean do less damage to the person who receives the bullet.
You mean do less damage to the barrel itself? I have to admit other then the physics of the flight path I am pretty ignorant of the workings of rifles and pistols.
I guess that answers my question about even longer lengths, say a 10 meter barrel, the burn would finish way before the bullet leaves the barrel and would then just start slowing down due to f ...[text shortened]... ch the burn time to the barrel length so the burn finishes just as the bullet leaves the barrel.
Originally posted by sonhouseI don't like guns either.
You sound like quite an expert on the subject. My only experience shooting was when I almost offed my old man hunting for quail in California I was 13 at the time. I tended to not like guns after that. He was killed by a gun in a robbery much later so you can see how I feel about guns in general.
Originally posted by sonhouseM4/M16s don't leave exit wounds. Exit wounds are a sign of an inefficient overpowered round.
You mean like if the exit wound is 2 inches across vs 4 inches across? Wonder if that would make the person more alive, less dead