Joined
·
351 Posts
(The stupid things I think of in my spare time). My degree is not in physics but I have taken a few classes on the subject and I'm not as stupid as I look. :?
Newton's 3rd law of motion states that "For every action there is an equal and opposite reaction" This means that if a bullet is coming out of a gun with a certain force there must be the same force applied on the opposite direction. Some of that force is absorbed in the weight of the gun and your body because of Newton's first law which is "An object will remain at rest, or continue to move at a constant velocity, unless an external net force acts upon it." The rest is found in the kinetic energy of the traveling bullet I think.
This got me thinking about the different types of ammo. Let's take a .357 magnum with Federal ammo for example. Federal makes 2 flavors of Premium Personal Defense Hydra-Shok JHP for that caliber. The 158 gr. has 539 ft/lbs of energy at 1240 fps. The 130 gr. has 574 ft/lbs at 1410. Now what I don't get is the 130 gr. with more energy and velocity is rated as their Low Recoil version. What gives? How can the the more powerful round have a lower recoil? Am I not including the weight of the bullet in the equation? I thought that the energy measurement would include the mass if the bullet and velocity.
Newton's 3rd law of motion states that "For every action there is an equal and opposite reaction" This means that if a bullet is coming out of a gun with a certain force there must be the same force applied on the opposite direction. Some of that force is absorbed in the weight of the gun and your body because of Newton's first law which is "An object will remain at rest, or continue to move at a constant velocity, unless an external net force acts upon it." The rest is found in the kinetic energy of the traveling bullet I think.
This got me thinking about the different types of ammo. Let's take a .357 magnum with Federal ammo for example. Federal makes 2 flavors of Premium Personal Defense Hydra-Shok JHP for that caliber. The 158 gr. has 539 ft/lbs of energy at 1240 fps. The 130 gr. has 574 ft/lbs at 1410. Now what I don't get is the 130 gr. with more energy and velocity is rated as their Low Recoil version. What gives? How can the the more powerful round have a lower recoil? Am I not including the weight of the bullet in the equation? I thought that the energy measurement would include the mass if the bullet and velocity.