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Cartridge Efficiency vs Recoil
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<blockquote data-quote="J E Custom" data-source="post: 1298624" data-attributes="member: 2736"><p>No problem, this is a debate and all post are welcome.</p><p></p><p>I will put it another way (I am not the best wordsmith) And may not have explained it very well.</p><p></p><p>There are two kinds of recoil produced when a firearm is fired. Bullet recoil caused by the bullet being accelerated down the barrel. (Newton's law). and the jet effect of the gas from the powder being pushed out the barrel. The first type of recoil can only be altered buy changing bullet weight, changing velocity and/or increasing or reducing the weight of the weapon. The bullet shape or crown have no effect of this type of recoil.</p><p></p><p>Gas recoil can be effected by many things. Burn rates, muzzle brakes, ETC (anything that redirects the gas and prevents it from exiting straight out of the bore). Case head diameters only change the </p><p>loading on the bolt in PSI.</p><p></p><p>Also If you fired a blank you would eliminate bullet recoil and only have gas recoil to deal with. Also most blanks have/need very little powder so this recoil would be very little.</p><p></p><p>Two examples of the different amounts of gas recoil and bullet recoil. A 150 grain load for a 308 using 44 grains of powder will have 56.3 % gas recoil and 43.7 % bullet recoil. A 223 rem using a 55 grain bullet and 25.0 Grains of powder will have 69.0% gas recoil and 31% bullet recoil, because of the bullet to powder ratio</p><p></p><p>So if you loaded the same powder charge and no bullet, the .308 recoil would be 6.7 ft/lbs instead of 11.9 with a bullet.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1298624, member: 2736"] No problem, this is a debate and all post are welcome. I will put it another way (I am not the best wordsmith) And may not have explained it very well. There are two kinds of recoil produced when a firearm is fired. Bullet recoil caused by the bullet being accelerated down the barrel. (Newton's law). and the jet effect of the gas from the powder being pushed out the barrel. The first type of recoil can only be altered buy changing bullet weight, changing velocity and/or increasing or reducing the weight of the weapon. The bullet shape or crown have no effect of this type of recoil. Gas recoil can be effected by many things. Burn rates, muzzle brakes, ETC (anything that redirects the gas and prevents it from exiting straight out of the bore). Case head diameters only change the loading on the bolt in PSI. Also If you fired a blank you would eliminate bullet recoil and only have gas recoil to deal with. Also most blanks have/need very little powder so this recoil would be very little. Two examples of the different amounts of gas recoil and bullet recoil. A 150 grain load for a 308 using 44 grains of powder will have 56.3 % gas recoil and 43.7 % bullet recoil. A 223 rem using a 55 grain bullet and 25.0 Grains of powder will have 69.0% gas recoil and 31% bullet recoil, because of the bullet to powder ratio So if you loaded the same powder charge and no bullet, the .308 recoil would be 6.7 ft/lbs instead of 11.9 with a bullet. J E CUSTOM [/QUOTE]
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