200 is fairly short range so wind will have minimal effect but it does seem to take a certain distance for the bullet to settle. If you have a high ballistic coefficient bullet that shoots well at that range it tends to shoot well at extended ranges.
Also if you zero at say 600 yards even a small amount of wind will have a more significant impact on the bullet then at 200 yards. So I set zero for wind at 200 with as calm of conditions as I can find. Then when I am shooting at 600 I might dial a minute of wind depending on condtions but that is always based from my 200 yard calm zero.
Depends on the rifle and its uses.
I zero at what makes sense, usually 100 or 200m
And confirm my point of impact to every known instance I shoot.
Make a good dope card, and then start playing external factors like weather and temp
While I do make basic dope card on a square range. The varied distances in the competitions I shoot and the various locations lend them self to using a Ballistic App of some type.
How many shots do you use to determine your zero?
What is an acceptable zero, and what is your method for achieving it/confirming it?
Does it change/what do you do about it?
depends on the end use application
zeroing is easily achieved but sending bullets through paper target. You can use electronic if facilities are available.
It can change.... sort out your system
When sorted, understand affects from external conditions.
simple...... or more info as there is no one size fits all given the massive range of disciplines we shoot.
Jerry
While #### happens!! I do wonder how much zeros really change or often are these wandering zeros the result of folks not taking a large enough sample size to first understand their actual group size and then centering it.
Mine changes in temp. In the winter my 100y zero is 4moa lower than the summer with the same ammo. Also notice a difference between the 2 ranges I shoot at. Open field range vs baffled with side berms.
While #### happens!! I do wonder how much zeros really change or often are these wandering zeros the result of folks not taking a large enough sample size to first understand their actual group size and then centering it and properly dialing out parrallax