Posted: 12/19/2008 1:03:22 PM EDT
| I was wondering, because I heard that when you fire a handgun like a .45 or whatever, the bullet exits the bore BEFORE the recoil is felt and the muzzle is forced upward. Does this also apply to rifles like the AR or any other popular rifles? Where the bullet will be out of the barrel before the actual recoil is felt? And if so, does that negate the "follow through" argument that some marksmen talk about since the bullet has already left before the recoil was felt and thus makes it unnecessary? |
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Quoted:
So you heard that Newton's 3rd law of motion has a pause button? Hahaha. Well, look at ultra slow motion video as well, they've shown bullets leaving the barrel just before the backward motion on the weapon kicks in because of the velocity that it travels. |
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Quoted: As soon as the reaction begins one way I hear there is an equal an opposite one going the other unless acted upon by another object. Quoted: So you heard that Newton's 3rd law of motion has a pause button? Hahaha. Well, look at ultra slow motion video as well, they've shown bullets leaving the barrel just before the backward motion on the weapon kicks in because of the velocity that it travels. |
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http://www.youtube.com/watch?v=BW93WQ98s-I&feature=related
Here is a demonstration of it. Where the bullet is LONG gone before the before the weapon really starts to recoil. I'm not saying that there is NO recoil after the bullet is fired, but it's effect doesn't really come into play until AFTER it has left the bore. |
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Watch this at the 3 minute mark, you can see the barrel begin to recoil slightly before the ring pops out followed by the round.
http://www.youtube.com/watch?v=b1DwCpqwbbc Test to see if YT markup works here yet: [yt]b1DwCpqwbbc[/yt] |
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Quoted: http://www.youtube.com/watch?v=BW93WQ98s-I&feature=related Here is a demonstration of it. Where the bullet is LONG gone before the before the weapon really starts to recoil. I'm not saying that there is NO recoil after the bullet is fired, but it's effect doesn't really come into play until AFTER it has left the bore. Look at the video more closely. the pistol is driven into the hand the instant the round starts to move. The pistol obviously can't go through the hand so the energy is then dissipated in the direction of least resistance (which is what it was doing the whole time anyway). |
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Quoted:
http://www.youtube.com/watch?v=BW93WQ98s-I&feature=related Here is a demonstration of it. Where the bullet is LONG gone before the before the weapon really starts to recoil. I'm not saying that there is NO recoil after the bullet is fired, but it's effect doesn't really come into play until AFTER it has left the bore. Your video isn't show slow enough to see the recoil. |
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Quoted:
Quoted:
As soon as the reaction begins one way I hear there is an equal an opposite one going the other unless acted upon by another object.
Quoted:
So you heard that Newton's 3rd law of motion has a pause button? Hahaha. Well, look at ultra slow motion video as well, they've shown bullets leaving the barrel just before the backward motion on the weapon kicks in because of the velocity that it travels. True, but the action is in force. Force x Mass = acceleration. So a force acting equally on a 55 grain bullet creates many magnitudes more acceleration that the same exact force applied to an 8 pound rifle or even a 3 pound pistol..... (Also remember the rice krispies at the top of the bowl dry first because they are closer to the sun, yes indeed folks, we try to insert a little bit of science into each and every show...  )
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| If you put a plane on a treadmill.....nah....anyway, sure, it has to move...some! Every action has an equal or opposite reaction. I think part of the reason you're not seeing peoples hand fly back during the slow motion vid is because the round is leaving the bbl before the slide is in full recoil...You know, the mass flying backwards fast as hell. I dunno, I barely passed physics and that was almost 10 years ago |
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Quoted:
The gun doesn't move until the bullet leaves the barrel because the bullet is spinning. Rotational energy = straight-line energy, but not in the presence of nitrocellulose or its combustion elements. If that were the case...oh nevermind...teaching a pig to sing... |
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After watching the video's if you still want a more visual demonstration do this.
When you fire the handgun, try to fight the recoil, in other words put pressure down with you hands trying to stop the rise of the weapon. On a rifle, as soon as you press the trigger, look up at the target for your bullet hole. Both times, you'll see that your accuracy has gone to shit. Unfortunately too many people do exactly what I've described, because they think that the bullet is long gone downrange. Follow through, with both a handgun, and a rifle is very important. Only if you wish to hit what your aiming at. |
. Makes perfect sence now 
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Quoted:
Quoted:
http://www.youtube.com/watch?v=BW93WQ98s-I&feature=related Here is a demonstration of it. Where the bullet is LONG gone before the before the weapon really starts to recoil. I'm not saying that there is NO recoil after the bullet is fired, but it's effect doesn't really come into play until AFTER it has left the bore. Look at the video more closely. the pistol is driven into the hand the instant the round starts to move. The pistol obviously can't go through the hand so the energy is then dissipated in the direction of least resistance (which is what it was doing the whole time anyway). The only force pushing back on your hand is the force of the compressing recoil spring against the pistol frame until the slide bottoms out against the slide stop. That's when the muzzle jump occurs. Obviously the slides of larger calibers are heavier or going faster that smaller ones and cause more muzzle rise. edit - not argueing, just adding. 
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Quoted:
The gun doesn't move until the bullet leaves the barrel because the bullet is spinning. Rotational energy = straight-line energy, but not in the presence of nitrocellulose or its combustion elements. I guess Newton's 3rd law did take a vacation. The slide reaches it's fastest rearward motion as the bullet just leaves the bore. |