Got my first 500 meter F/TR class win this weekend! It was my 3rd match, having placed 7th and 3rd in the first two. I shot a 143/150 4X.
Winds were about 12MPH, but I didn't see them switching at all. Just the wind speed would change occasionally, in which case I was favoring the 3:00 10ring hold off more or less as needed. I had 2 MOA dialed into the scope. There was only 1 point separating the top 3 places, and the other two guys were shooting .308 while I was shooting the .223 Very satisfying day for me and my Savage.

#10 action
Shilen Select Match 28" 1/7 .223 Wylde
Choate stock
Rifle Basix Sav2 trigger
Berger 80gr VLD + Varget

Big thanks to forum member kschilling for helping me build this rifle and teaching me the ropes.