Recoil: A different way to think about it

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    1. #1
      Senior Member hideit's Avatar
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      Recoil: A different way to think about it

      what do you think about this?
      This is basically for some of the people that are new to guns.

      I was thinnking about recoil, due to some recent threads, and was wondering about the weight of the gun vs the muzzle energy (ftlbs/oz), lets just call it FPPO, foot pounds per ounce. The FPPO can give and insight to how much recoil will be felt - lower FPPO the lower the recoil
      I had an LCP and sold it due to hurting the hand - not a gun to shoot or an hour!
      so for the cartridges I used:
      200 ftlbs for 380 - about the max for 380s
      320 or 9mm - about mid range for 9mm
      352 for 45ACP - about mid range for 45acp

      what i found was
      ruger LCP gave 21.3 FPPO
      kahr CM9 gave 20.1 FPPO
      sig 938 gave 20 FPPO
      S&W Shield gave 16.8 FPPO
      S&W 380 bodyguard gave 16.3 FPPO
      Glock 19 gave 15.2 FPPO
      Glock 17 gave 14.5 FPPO
      sig 238 gave 12.8 FPPO
      sig 238 HD gave 10 FPPO
      kimber 45acp SSII gave 9 FPPO
      so the sig 238 HD gives 53% less recoil, and the std 45acp govt model gives 58% less recoil, than the LCP
      the std 1911 45acp govt model is less recoil than the glock 17 - guess that's why we often call the 1911 recoil as a PUSH
      hotter ammo obviously gives higher FPPO values -

    2. #2
      Senior Member hideit's Avatar
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      oh - one more thing-
      my wife wants a 380, with stainless steel, and easy to rack the slide
      looks like the sig 238HD is for her
      once i get it and she shoots it - wait till I tell her its the same amount of recoil as a 1911 govt model (hehehe)

    3. #3
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      Has she ever handled a Ruger SR40? Bought the wife one, and she loves it....so do I....
      Quote Originally Posted by hideit View Post
      oh - one more thing-
      my wife wants a 380, with stainless steel, and easy to rack the slide
      looks like the sig 238HD is for her
      once i get it and she shoots it - wait till I tell her its the same amount of recoil as a 1911 govt model (hehehe)

    4. #4
      Senior Member Steve M1911A1's Avatar
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      Now you can understand why I recommend the 1911 as the quintessential beginner's gun.

      The "slow push" recoil is also a function of the slow-moving bullet, the mass of the moving slide, and the net mass of the entire, all-steel gun.

    5. #5
      Senior Member hideit's Avatar
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      exactly - that is why i mentioned that the info was for some of the beginners new to guns

    6. #6
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      I think bullet momentum (vs energy) per gun-ounce would be the correct basis of comparison.

    7. #7
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      How do you get the figures? What is the CZ75-SP01? vs. say the Ruger SR9 or the hi-point C9

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      Senior Member Steve M1911A1's Avatar
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      Quote Originally Posted by Scott9mm View Post
      I think bullet momentum (vs energy) per gun-ounce would be the correct basis of comparison.
      Well, if you want to nit-pick, the really correct measure would be moving-bullet inertia versus gun inertia.
      But my own experience makes me agree with the figures that hideit published in the first post of this thread.

      You could compute the competing inertia figures from the given information, you know.

    9. #9
      Senior Member hideit's Avatar
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      Quote Originally Posted by BowerR64 View Post
      How do you get the figures? What is the CZ75-SP01? vs. say the Ruger SR9 or the hi-point C9
      just find the ounces that the gun weighs empty and divide it by the muzzle energy of the bullet you want to think about using
      CZ75-SP01 - 8.3 using the 320 ftlbs ME cartridge
      ruger sr9 - 12 "
      forget the hi point

    10. #10
      Senior Member hideit's Avatar
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      Quote Originally Posted by Steve M1911A1 View Post
      Well, if you want to nit-pick, the really correct measure would be moving-bullet inertia versus gun inertia.
      But my own experience makes me agree with the figures that hideit published in the first post of this thread.

      You could compute the competing inertia figures from the given information, you know.
      some people have trouble with mathematics - hehe

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