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will rain and high humidity..... |
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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It is my humble opinion that every single person participating in this thread knows exactly what effect gravity has on a bullet the instant it leaves the confines of a barrel, regardless of the orientation of the bore C/L. Furthermore, each of you deep down also knows the other gents know what happens to said bullet, since we've had this discussion before.
I believe this has become a debate over semantics. I believe the OP's questions have been answered. Humidity definitely affects bullet trajectory as noted. Rain... not sure whether or not anything's been proven conclusively, however it seems logical to me there should be an effect if one is shooting in a monsoon-level downpour. I highly doubt there is any noticeable change in bullet drop in light rain, except to the extent rain increases humidity and therefore makes air less dense. Overall, I tend to believe rain has more affect on the shooter than the projectile. |
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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338LAPUASLAP
Optics Master Scope Swapper Joined: October/17/2009 Status: Offline Points: 2596 |
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Even in a light rain the bullet is driven down by each impact as rain usually drops from the rain clouds...
So every time the bullet is struck, even though has not been opposed by an equal or greater force as been impacted thus having a minute change to the bullets trajectory while you can argue it is less dense air therefore not as much drop the light rain in this case does have more of an affect on the bullets drop than the lessening of the drop due to the humidity in the air. I believe this again makes sense from a layman's perspective. There is no force field or shield...
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No one
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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Understand the rationale. This assumes that the impact actually occurs, though. Is it possible the bow shockwave could disrupt potential impact?
I believe rain's effect on a bullet's flight would likely be minimal, and whatever magnitude exists would certainly be unpredictable. |
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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jonoMT
Optics Master Extraordinaire Joined: November/13/2008 Location: Montana Status: Offline Points: 4853 |
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Humidity would definitely effect my shooting for the worse. It was bad enough running around in it while in Missouri earlier this month.
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Reaction time is a factor...
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Bigdaddy0381
MODERATOR Georgia peach Joined: February/27/2007 Location: Georgia Status: Offline Points: 13682 |
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wouldn't the heat evaporate the rain around the bullet in flight?
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P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.
Ecclesiastes 10:2 |
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338LAPUASLAP
Optics Master Scope Swapper Joined: October/17/2009 Status: Offline Points: 2596 |
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While they have a model for this it still causes impact and or vibrations which slows changing the directional momentum. think of the splash of water down than up for a single drop...
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No one
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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Would be the basis for an interesting test. Has there ever been a test done to conclusively quantify the effects of rain on bullet trajectory? I don't know.
Since an object moving close to or over supersonic speed compresses the air in front of it, my thinking is that the compression should disrupt the movement of a water droplet (which has a mass of only about .05 gram) and cause it to flow around the compression wave like an airfoil, preventing it from colliding with the bullet. In fact, the supersonic compression causes water in the air on a clear day to condense anyway. This is the familiar vapor cloud you see forming around a jet as it approaches Mach 1. I've shot several game animals and zeroed rifles in the rain and have never seen any POI difference, but all < 300 yds. I've never done any long range shooting while it was raining that I can recall. |
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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FWIW, I have a book entitled "Understanding Firearm Ballistics" and looked in the index for affects of rain. In it, author Robert A. Rinker had this to say about shooting in the rain (page 376):
"While rain can make a hunt or a day on the range miserable, it has little or no effect on the projectiles. The statistical probability of a tiny bullet that is in the air for such an incredibly short period of time striking a raindrop is thought by many experts to be small. If it contacted a drop or two or even a thousand, the trajectory or gyroscopic stability is not affected. At least not that testing by the U.S. military has discovered. Of course in testing, it is not possible to determine which bullets hit a raindrop and which did not (unless shots are fired through a stream of water, but this will greatly exceed the proposed problem). The chronograph and targets showed no difference." |
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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Been away for a while... doing trajectory anaylysis for some upcoming efforts. I put this together a while back, but just got time to post. There is more available...
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Opinion,untempered by fact,is ignorance.
There are some who do not fear death... for they are more afraid of not really living |
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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Watch the video… a physics lesson for those who do not understand. Specifically about 19.5 minutes in…
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Opinion,untempered by fact,is ignorance.
There are some who do not fear death... for they are more afraid of not really living |
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Urimaginaryfrnd
MODERATOR Resident Redneck Joined: June/20/2005 Location: Iowa Status: Offline Points: 14964 |
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Yep - you would have enjoyed my old CSM she thougth a rifle bullet went in a straight line forever which is why rifles are so dangerous. Sometimes its just better for me to keep my mouth shut.
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"Always do the right thing, just because it is the right thing to do". Bobby Paul Doherty Texas Ranger |
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Peddler
Optics God Joined: July/04/2012 Location: Oswego,NY Status: Offline Points: 13533 |
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Well guys if I hadn't seen the recent post on this subject the subject had been completely erased from my mind. I saw " Bucky " on Friday and as you can imagine I shot and he fell or did he fall. Well as the bullet was falling " Bucky " also fell. Seriously I love this forum and continue to learn from it almost each and every day. Keep up the great work. Skip |
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When you are dead, you don't know you are dead.It is difficult only for others.
It is the same when you are stupid. |
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338LAPUASLAP
Optics Master Scope Swapper Joined: October/17/2009 Status: Offline Points: 2596 |
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Just for grins!
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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Physics remains the same..
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Opinion,untempered by fact,is ignorance.
There are some who do not fear death... for they are more afraid of not really living |
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338LAPUASLAP
Optics Master Scope Swapper Joined: October/17/2009 Status: Offline Points: 2596 |
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Miss these type of posts.
Lots of great info for passers by.
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Rancid Coolaid
MODERATOR Joined: January/19/2005 Location: United States Status: Offline Points: 9318 |
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I am so glad you resurrected this one! Usually the rise of a 3 year old thread is some inane thing, this one was bordering on epic.
And, for the official record, ILya and I were right (are still right) and all ya'll were wrong, at least in my frame of reference. In all seriousness, I appreciate that there is a place we can come and discuss such things in a constructive manner, and 3 years later, still be talking civilly (mostly) to one another about such things.,
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Freedom is something you take.
Respect is something you earn. Equality is something you whine about not being given. |
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338LAPUASLAP
Optics Master Scope Swapper Joined: October/17/2009 Status: Offline Points: 2596 |
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I still want to know where I was wrong with 100% humidity and rain!!! and the bullet somehow went upwards and was not pulled by gravity or was not impacted by opposing forces... j/k
I deleted all my pictures but I am pretty sure your bullet went higher than the barrel when it left! Then you retracted. j/k I am a big kidder now.
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