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will rain and high humidity.....

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RifleDude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: August/21/2013 at 16:41
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.



Ted


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Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: August/21/2013 at 19:25
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: August/21/2013 at 21:13
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.

Ted


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Post Options Post Options   Thanks (0) Thanks(0)   Quote jonoMT Quote  Post ReplyReply Direct Link To This Post Posted: August/22/2013 at 08:50
Humidity would definitely effect my shooting for the worse. It was bad enough running around in it while in Missouri earlier this month. Big Smile
Reaction time is a factor...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bigdaddy0381 Quote  Post ReplyReply Direct Link To This Post Posted: August/22/2013 at 09:31
wouldn't the heat evaporate the rain around the bullet in flight? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: August/22/2013 at 09:40
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: August/22/2013 at 12:29
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: August/27/2013 at 18:07
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kickboxer Quote  Post ReplyReply Direct Link To This Post Posted: September/01/2013 at 16:13
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kickboxer Quote  Post ReplyReply Direct Link To This Post Posted: November/09/2013 at 17:36
Watch the video… a physics lesson for those who do not understand.  Specifically about 19.5 minutes in…


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Urimaginaryfrnd Quote  Post ReplyReply Direct Link To This Post Posted: November/09/2013 at 21:16
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.     Whistling  Sometimes its just better for me to keep my mouth shut.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peddler Quote  Post ReplyReply Direct Link To This Post Posted: November/10/2013 at 05:58
Originally posted by Peddler Peddler wrote:

Originally posted by 8shots 8shots wrote:

When I shoot upwards the buck falls, when I shoot perpendicular the buck falls, when I shoot downwards the buck falls.
 
What more do I need to know?


8shots you stole my thunder, that's almost exactly what I was going to say. I have a headache after all that stuff, but you know what , I love it. I've learned more on this forum than you can imagine. Now next month when Whitetail season opens I hope when I have " Bucky " in my scope I don't start thinking about all of this " S--T "

Thanks guys that was great.

Excellent


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.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: March/24/2016 at 21:12
Just for grins!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kickboxer Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2016 at 00:52
Physics remains the same..
Opinion,untempered by fact,is ignorance.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2016 at 01:20
Miss these type of posts.

Lots of great info for passers by.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rancid Coolaid Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2016 at 09:01
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2016 at 09:53
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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