Re: Wind read- More important at gun or target?
Once a bullet begins to move off path due wind, even at the shooter, it stays off ...
Over distance, especially in heavy wind, wind at the shooter is absolutely important because it's a dumb bullet. Once blown off, it stays off and because wind at the shooter gives the longest time of flight, it has the largest potential drift.
Wind at Mid Range, when Max Ord comes into effect, is important because the wind velocity increases with increased height above the line of sight. So wind measured at the shooter for a 1000 yard shot that reads 8 MPH might be 10 MPH at max odd... so the increase in velocity has increased drift.
Inside 600m max ord is less of a factor, and height above line of sight is significantly less, and TOF is significantly shorter, so mid range wind has less of an appeal, due to reduced effect. Wind at the shooter is more important because it has 100% of the TOF to act on the bullet.
It's pretty simple to take a program such as LoadBase 3 and turn on the multiple wind features and see the difference the different effects have... Wind Zone 1, at the shooter, is still the most important, Wind Zone 2, Mid Range, is only so if you increase the velocity for increased wind speed.
All things being equal, Wind at the Shooter, has the greatest cumulative effect because of TOF. This is why Wind Cheater cartridges work, they fly flatter, less height for Max Ord, and they fly faster, Less TOF... hence they cheat the wind. All that together points to the wind at the shooter being the first in priority followed by Mid Range and Terrain.
Once a bullet begins to move off path due wind, even at the shooter, it stays off ...
Over distance, especially in heavy wind, wind at the shooter is absolutely important because it's a dumb bullet. Once blown off, it stays off and because wind at the shooter gives the longest time of flight, it has the largest potential drift.
Wind at Mid Range, when Max Ord comes into effect, is important because the wind velocity increases with increased height above the line of sight. So wind measured at the shooter for a 1000 yard shot that reads 8 MPH might be 10 MPH at max odd... so the increase in velocity has increased drift.
Inside 600m max ord is less of a factor, and height above line of sight is significantly less, and TOF is significantly shorter, so mid range wind has less of an appeal, due to reduced effect. Wind at the shooter is more important because it has 100% of the TOF to act on the bullet.
It's pretty simple to take a program such as LoadBase 3 and turn on the multiple wind features and see the difference the different effects have... Wind Zone 1, at the shooter, is still the most important, Wind Zone 2, Mid Range, is only so if you increase the velocity for increased wind speed.
All things being equal, Wind at the Shooter, has the greatest cumulative effect because of TOF. This is why Wind Cheater cartridges work, they fly flatter, less height for Max Ord, and they fly faster, Less TOF... hence they cheat the wind. All that together points to the wind at the shooter being the first in priority followed by Mid Range and Terrain.