OP, do you handload? if so, 223 can be made to perform. I won a 1000 yard match shooting a 223 with 80 gr Sierra bullets.
In a test at 1000 yards, i shot 20 rounds of 223 and 20 rounds of 308 at the same target, and compared the group widths. The 223 was slightly narrower. i.e. it handled the wind better than the 308. Sierra 155 vs Sierra 80.
In a test at 1000 yards, i shot 20 rounds of 223 and 20 rounds of 308 at the same target, and compared the group widths. The 223 was slightly narrower. i.e. it handled the wind better than the 308. Sierra 155 vs Sierra 80.