Asking the more experienced medium distance shooters here......
Yesterday was windy, so I headed out to the range to work on wind calls at medium distances of 300 to 500 yards.
Equipment: Savage 12BVSS in .223 with a Swarovski Z5 3.5x18 (BRH reticle).
Ammo: reloads verified to match the ballistics of Federal Gold Medal Match with a 69 grain SMK.
Conditions: 6% humidity, temperature 93 degrees, wind varying from 7 to 18 mph coming from behind the shooting position, varying slightly from 7 to 8 o'clock (quartering, not full value).
Range setup: shooting position top of a ridge, target was a 10" square plate on another ridge 492 yards away. There is a small canyon or wash in between the ridges. If you're familiar with the Cowtown range outside of Phoenix, I was on west platform 2.
The wash in between the ridges is roughly 30-40 yards deep, and the target was approximately 50 yards higher than the shooting position.
Incredibly accurate MS Paint side view:
The lateral hold off for the maximum wind gusts was about 2 mils. What confused me at the time was that I also had to change my vertical hold off to what would normally be my 450 yard hold. At the time I just dealt with it, but it's been bugging me ever since.
My theory is that the wind was flowing through the canyon/wash, striking the face of the mountain, and creating an upward current as it flowed over the ridge that
lifted the bullet as well as moving it sideways.
Am I completely off base here? This was not the first time I've experienced this effect, but it's the first time I really thought about what was happening.
Feedback from the hive would be appreciated just so I can sleep tonight.