Just wanted to share this information about how to read wind speed and direction. I took a long range shooting class and the instructor gave me some information on helping determine wind speeds. The other attachment show the value you would give the wind once you determine the speed. I am sure someone out there would be able to explain this better than me, but I thought the little hints on speed may help someone. if anyone is interested I can email this file, just shoot me a pm.
The main problem with this stuff is you might be able to judge the wind where you are standing but how do you just what its doing 200, 300, 400 and beyond? At least at 600 and 1K matches you get a sighter period to actually shoot and see where your bullet hits. In the field, taking a long range shot can be a crap shoot. Then......................what happens when that wind you just figured out, lets up? or picks up? You can see that in some of my groups. Long range without sighters or a spotter, is a tricky game.
Most of us will never shoot at game over 300 yards. At that distance I think most of the guys that try that shot has shot that far before., so making a kill shot on a deer should be pretty easy. I think the biggest problem when shooting 300 or less is people tend to over correct. If you are only wanting to make a kill shot on a deer standing broad side at 300 yards, forget about the wind and concentrate on you elevation. This is the part you can control., aim 2 inches behind the front shoulder and if the wind gets you 5 inches either way you still have a DRT shot.. Over correct for the wind and you just blew out the neck and will be on a tracking mission all day.. If you don't have a good clean shot then you owe it to the deer to pass.
Where I hunt, most of the time the deer are not pressures, so they are usually just walking, so good shots present themselves to me quite often., once in awhile a buck will come in chasing a doe, and even as close as 50 yards I have had to pass because I just couldn't get a good clean kill shot.
Practice at the distance you think you might get a shot.. If it 300-400 yards then you will know what your capabilities are... Killing deer at 300 is easy,, hitting that 3/4 inch orange dot everytime is a different ball game..
Post by bestill458 on Sept 18, 2015 5:37:17 GMT -5
I agree with hank practice and know your rifle and set realistic limits when taking a shot on game. I would recommend practice in wind you maybe surprised. There is varible (temperature ,elevation,humidity)when running correction charts. 327 mh at 2800fps mv at 10 mph cross wind will drift 2.5 moa. 300 yds
275 be at 3000 fps mv at 10 mph cross wind will drift 3.5 moa. 300 yds
When shooting Saturday at 500 yds in 15 mph wind with270 emax at 2450 fps mv my correction was 7.25 moa that's36.25"
Last Edit: Sept 18, 2015 5:46:35 GMT -5 by bestill458
The boys and I took 5520 rounds of .308 Win and the long guns up to Stem, NC (where I had no cell service so I got a nice digital vacation) to do some day and night shooting away from the flagpole. It's good to get away and be on your own sometimes without someone trying to manage your schedule and it's good to get off of your home range where terrain and wind are unfamiliar. I got in at 3AM last night after driving back, wiping down guns, turning in guns and brass, and cleaning then turning in the cargo van we hauled it all up in. Per our usual schedule on the weekends, my dogs insured I was back up at 6AM to go pee and make coffee.
The wind description up on the card is pretty accurate although I would argue some of the mirage speeds. The card for direction is accurate too but I'd bet cash dollar bills against most people they can't nail speed much less the difference between a wind direction coming from 1:30 vice 2:00. Most guys have no idea what effect a head or tail wind has, or that wind has up and down drafts, that there is a gradient at max ord that is faster than what you are reading for mirage on the ground, or the aerodynamic jump that comes from a cross wind. Wind is always the most difficult and most limiting factor.
For most hunters it is a non issue since the shots in most locales are 200yds and in. If you can shoot further my personal rule is no shots past 400yds if winds are in excess of 10mph. Nobody is going to starve if I choose not to crush the trigger but the deer might if I do and I'm wrong, or worse dies of sepsis.
Keith the information I shared is way over my head. I figured I would just share it so that if someone wanted go out and see if they could tell the difference between a 3-5 mph wind. When I went to the class I personally couldn't tell a difference but my 175 .308 at 1100 yards could. The person I shoot with is tactical match shooter and seemed to really have a handle on the wind.
I figured the information I shared would have to be explained by someone with much more experience then me.
It is probably almost impossible for someone shooting to also judge the wind without a spotter. I was concentrating so hard on the target I wouldn't have noticed a hurricane. A couple of times I did notice when the wind switched from say 3 to 6. I never noticed the very slight changes.
It was good info and is helpful. Wind is by far the most difficult part of LR shooting and takes a long time to get a handle on. I am by no means a master but I am fortunate to get a lot more exposure to it than most. I only know one guy who I think is nearly flawless with wind but if you look at his log books from matches you can see a miss every now and again due to wind. If you own one the best way to get a handle on it is to take your Kestrel with you when you take the dog for a walk and guess wind speeds as you go based on what you sense around you. After a while you will start reading mirage from the road while you drive.