??? I think your logic is way off on this one thermaler ???
I think water vapor is denser than all the others mentioned?
Just Sayin :-))
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??? I think your logic is way off on this one thermaler ???
I think water vapor is denser than all the others mentioned?
Just Sayin :-))
http://www.theweatherprediction.com/habyhints/260/
I'm also a glider pilot--and need to be very aware of air density. Every now and then you'll hear of crashes where a plane didn't get off the ground in time in hot, humid conditions due to heavy loading.
That's what I love about this place! I learn something new every day !
Thanks.....Jim :-))
The air is defently heavier in humid conditions. Ive purposely gone out to the desert valleys in adverse conditions (high humidity) and started sending rounds out to 1K and found my poi falling short by about 1-1.5 moa @ 1K. 10 inches doesnt sound like much buts its the difference between a hit or a miss.
Ive shot the same rig out to the same distance in dry conditions and my rounds went where there supposed to go.
Frankly, Id much rather deal with wet air as opposed to dry "windy" air. Seems like the more i think I have my windage adjustments figured out, the more the Gods of wind send me back to school.
fooled indeed.
some-not all ballistic calculators ask for humidity levels.
What ive found is that the higher the humidity, the more drop of the projectile. be as it may, its slight but at distance, it makes a world of difference.
Luckily for me, the ballistic calculator I use doesnt ask for humidity nor baro pressure. defently ask for temp and altitude along with the rest of needed inputs and has always been spot on. I know that altitude and baro pressure almost go hand in hand relatively speaking.
Id of figured theres more water molecules in the air causing more of a bullet drag.
apparantly not
I don't doubt for a second that your results are exactly what you say--and can see why you might think humidity actually adds mass to the air.
I definitely don't have the ballistics knowledge or long distance trajectory experience that you do--but I'm guessing that the other factors like pressure altitude and air temperature probably have more effect on your results than the additional humidity you experienced.
I've been flying for almost 30 years--and have learned that the atmosphere is a very dynamic environment that rarely can be modeled with precise accuracy by even our best supercomputers--just look at how often the weather guys get it wrong. Much modeling assumes standard rates of change in things like ambient air cooling and barometric pressure changes--but those standards can literally and figuratively be tossed to the wind depending upon things like a frontal passage, temperature inversions (very common in mountainous terrain) and heating/cooling of the earth's surface (convective heating). All other factors held constant--humid air is less dense than dry air--but I'm guessing what you experienced was a greater temperature or altitude density change which had a greater effect on your bullet's trajectory than the humidity.
This article on Lilja's website explalns why, in calculating the effects of humidity on a bullet's trajectory, humidity is considered negligible when compared to temperature and barometric pressure and is probably why some programs exclude humidity in their calculations. http://www.riflebarrels.com/articles...erformance.htm In the aviation community humid air can have profound consequences--both beneficial and disastrous.
don't workfor me either..H 4895 is the best for me....la la la
I have had the same experience as Frank when it comes to Varget...I tried it a couple of times with mediocre results and never went back.
roger that.
Ive considered paying closer attention to barometric pressure. My ballistic tables I have at hand for any giving round include tempetures from 50dg-100dg. I know cold weather defently has considerable amount oo drop as opposed to high temps.
When I started sending and hitting at long distance it became addictive/challenging. Theres so many variables dished out by mother nature which in turn have made it even more challenging.
having great groupings at short distance to me equates to better groupings at long distance but if you cant adjust to mother nature then its all for not....especially the wind.
So I will not wonder what happened if I miss the intended target. Well I've got great news.I am back from surgery at Buffalo VA this morning.They were thinking I had a brain tumor but it turned out that it wasn't a brain tumor. I told them one would have to have a brain in order to have a brain tumor but they weren't listening...... They were able to remove the tissue growth, I'm feeling more light headed than ever and I am already home.I should be ready to shoot in a week or so plus I got this in the mail today.I need to pick up a lottery ticket while I'm on a roll.........http://s17.postimg.org/k8ygube5r/DSCN2374.jpg
And for the faint of heart i scored 15 pounds of RL-15 today. Yes ladies and gents it also is not a myth.
Dang Gary !:hail: I see reloader 15 available on a pretty regular basis here.I bought a can of Winchester 748 which has been as rare as hens teeth around my area.
Wow, Crane, that's great news. Sorry you had to go through all of that. I know a little bit about the agony of anxiety. It's not fun for you or your family and friends.
Is there any Varget hiding out there. I am willing to drive to get it. Someone told me OK has Varget at several stores. ????
I'm actually selling up to 6 1lb canisters of Varget over on SnipersHide ($55 per two pounds), but can't ship it.
Im sure temp changes are affecting the powder burn more so than the bullet flight. We notice big changes in very cold weather and more with some powder than others.
Keeping the ammo warm till you shoot helps also. Humidity is an enemy for a long range hunter regardless of it's affect on bullet flight. On very humid days looking thru
high power optics is like looking thru a fish bowl. Higher altitudes and dry air is definatly a plus.
here in the southwestern part of Texas, summer temps are way up there so I keep them placed in my ammo bag.Keeps them abit cooler while Im sending rds. Varget was my powder of choice for not being temp sensitive. but seeing as how I couldnt find it in these parts I oppted for 4064, glad I did. 4064 is without a dought abit on the temp sensitive side. I see it in 90 plus dg weather when sending out to distance 800 out to 1200, but Im good with it. Pain to meter but I can also deal with that as well.
Im "extremely" lucky to have the locations to shoot at here in southwest Tx. elevations go from 3800 up to 4400ft at the locations I shoot at. Higher altitude,less powder,faster speeds,dry air etc....just have to deal with the freken winds which is non stop.
I probably dont see the humidity you see. The weather is dry for the most part except when the monzoon hits which is right now.
Looking back on this hole powder shortage. Im glad I was forced to look elsewhere as far as a propellant. When my Varget runs completely out, Im just going to stick with 4064..................least thats what Im saying right now, yr from now who knows what my reloading mind tells me to try. lolol
I cant find any of the propellants I like here. RL-15....4064....Varget.
The local range which is located on a military base used to carry everything. not anymore. any other lgs wont carry it either and if they do?.....its full pop-retail plus.
I have to get my propellants and components from the Phoenix Az. area
I think the powder "shortages" are different from region to region...here in Michigan I have seen little or no powder for about 2 years on most trips to any of my local options. I will say last week I did see IMR4064 and Win 748 in 1 pounders in volume at 2 places. I am glad I was hoarder before hoarding became popular and bought a few 8 pounders a few years ago when powder was everywhere....
I bought another can of Winchester 748 today. I kick myself for not buying a can of Varget with it but there is always tomorrow. It has been so long since I've seen Win powder and they only had 5 cans... Feels like I've found a snickers bar while I was enrolled in a fat camp or something. I might throw that can under my pillow ,next to the rifle barrel........ :rofl::rofl::rofl::rofl:
Good find. There has been no shortage of 4064 here.I love it in the 22-250 but have yet to try it in .223 caliber.3031 is a great .223 powder with 50 gr V Max bullets.Got some Bergers 52 gr match and 55 gr varminters coming in,I can't wait........
My 22-250 loves Varget. Over the last few years any powder has been scarce around here and to top the shortage off one of the (real) sporting goods stores here closed it's doors. So now there's only one place to buy supplies. If I'm there and they have powder I usually pick up a pound, the last couple pounds I bought were $30 each.
Wow...even at the height of the rush, I only paid $29/pound of 4064.
I have probably ten pound of 4064 as its the powder of choice for my 110e in 30-06 and what I intend to use in the 375R once I get the scope done and time to shoot. I basically pick it up when I see it, whether I need it or not.
We ought to remember these gougers and when supplies loosen up, let them know why you will no longer do business with them.
It certainly is fun messing around with the different powders.24.5 gr of Varget with a 55 gr bullet is pretty darn good through my axis. I pretty much have chosen the 4064 for my 22-250 and If I had to choose just 1 powder for the .223, it would be H335.It simply works great in a.223.
roger that!
A new LGS opened up its doors. When they 1st opened, there prices where reasonable but when the crunch hit?.....so did they. Ive never gone back and never will again. Ill spend upwards of 1k a yr on reloading components for all of my firearms. Ill gladley give my hard earned money to somebody else.
WOW! I was just at Cabelas and they had a total of about four choices of powder, including 4064 and 3031.
And the way the shelves were laid out, one would think they might not be supporting the reloading community for very long. They had rearranged the shelves to basically not have space for powder...a guy even commented when I was there "is this all they have?". While they had powder, it was oddball Winchester stuff I have never seen before (other than the IMR I bought). They use to have about every powder known to man on the shelf (or at least space for it on the shelf).
Kinda disappointing.
My local Cabelas put powder behind the counter around the first of the year, and has moved its location behind the counter a time or three.
Other Cabelas I have been to in the past (St. Louis, Kansas City, Gonzales LA, East Grand Forks MN, Allen TX) have had a shelf of powder out in the general reloading component area, but I haven't been in a non-local Cabelas in close to a year.
My local Cabela's did a major overhaul of floorspace a while back and expanded the reloading section...probably doubled the shelf space, but it has also put powder and primers in an "odd" location and smaller shelf...that being said, they have had piles of primers...but only had 4 or so powders last week....which is 3 more than they had the week before. I think their current shelf space says they are experiencing the same shortage everyone else is so why waste valuable display space to leave vacant for the time being? I suspect they will make room for powder again if and when it becomes available...if....