@Ionus,
Ionus wrote:Oralloy wrote:You need the long barrel of the rifle to contain the pressure behind the bullet long enough for it to accelerate to rifle velocities.
You dont need a long barrel, you need a barrel long enough
To get high rifle velocities, only a long barrel is long enough.
Ionus wrote:and there are degrees of burning speeds for gunpowder.
Rifles use slower-burning powder, and the bullet accelerates along the length of the barrel.
Ionus wrote:Even with a short barrel, most of the explosive force has already acted on the bullet .
Not in a centerfire rifle.
Ionus wrote:True, a standard round in a standard barrel length probably makes a slight bit of difference to speed, but to someone without a vest at close range the effect is negligible . The bullet is still supersonic and I wouldnt want to be hit by one at long range either .
The difference between "a .223 round going fast enough to explode" and "a .223 round not going fast enough to explode" is substantial.
Ionus wrote:Flash suppressors are for the elimination of flash . Any contribution they give to velocity is very minor .
Correct.