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Cartridge Efficiency vs Recoil
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<blockquote data-quote="ENGUNEER" data-source="post: 1313816" data-attributes="member: 69255"><p>Just to add a little extra fluid mechanics to this thread. The thrust (kick) on the rifle caused by firing a cartridge is due to three main factors: 1) the mass of the bullet and its exit (muzzle) velocity 2) the mass of the propellant and its exit velocity parallel to the rifle bore axis and 3) the pressure of the propellant at the exit compared to the atmospheric pressure. The propellant velocity can be much higher than the bullet velocity and can therefore have a higher thrust per unit of mass than the bullet. And, the propellant pressure can be quite high, adding significantly to the kick. The result is that the best thing you can do to reduce the kick is to install a muzzle brake, which causes the propellant gas to make a sideways turn (as compared to the bullet direction), thus negating its thrust. The other effects, such as reducing the propellant charge and using a propellant with a different pressure curve will have significantly less effect to the overall thrust on the rifle.</p></blockquote><p></p>
[QUOTE="ENGUNEER, post: 1313816, member: 69255"] Just to add a little extra fluid mechanics to this thread. The thrust (kick) on the rifle caused by firing a cartridge is due to three main factors: 1) the mass of the bullet and its exit (muzzle) velocity 2) the mass of the propellant and its exit velocity parallel to the rifle bore axis and 3) the pressure of the propellant at the exit compared to the atmospheric pressure. The propellant velocity can be much higher than the bullet velocity and can therefore have a higher thrust per unit of mass than the bullet. And, the propellant pressure can be quite high, adding significantly to the kick. The result is that the best thing you can do to reduce the kick is to install a muzzle brake, which causes the propellant gas to make a sideways turn (as compared to the bullet direction), thus negating its thrust. The other effects, such as reducing the propellant charge and using a propellant with a different pressure curve will have significantly less effect to the overall thrust on the rifle. [/QUOTE]
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