Egyikbe beleolvastam,ez csak arra példa,hogy tévedtem ott is vannak makkmarcik.
Én épp azt olvastam , hogy valóban gyorsul a lövedék.
6) That the bullet gets faster after it leaves the muzzle is a surprising and controversial result. The Army claims it's true and that a projectile doesn't require a barrel to accelerate. Alas, I cannot give an answer from personal experience so complete verification isn't entirely possible for me. I asked that question from the source, Army ammunition developers who developed that specific cartridge. The answer is theirs.
The Army guys [ballistic engineers] claimed to me that they measured it at distance increments of 10ft for a full 100 ft from the muzzle and so derived their statement. Projectiles can continue to accellerate as the Ammo plant test people showed me as the gas column is still pressing on the base of the projectile and still expanding in velocity as it too exits the barrel behind the projectile at a much higher velocity than the projectile. They claim this is why. Basically, they asserted to me that the effect of the explosion and propulsion from the gas column is still expanding and acting upon the projectile even as it leaves the barrel. The barrel also adds friction which tends to retard progress and once free of that friction it accelerates just slightly. I never had the ability to refute their claim as I lack the test bed they enjoy. But I just cannot dismiss those Army scientists out of
hand without verifying it myself. I spent too long in similar roles and I know how absolutely obstinate we are for testing.