The varmints do not have any feelings as to what bullet they dislike the most, they are only interested in their next meal and propagating their own kind. Should a person be available to eat they would cheerfully do so. From exhaustive experience I have found the Hornady VMax series of bullets to offer the best combination of accuracy, ballistic finesse, & cost for almost all applications. For a 6mm of any kind I would go for the 87 VMax, the plastic tip assures good expansion and increases ballistic efficiency, the boat tail also helps to maintain speed. A 6 mil 87 VMax as slow as 2000 fps, contacting small rodents as small as 1 pound will emphatically effect destruction.
I have replaced light weight zippy bullet .22-.250 loads with .204 40 grain Vmax bullets at 3750 fps from .20p & .204R. The .22-.250 is now loaded with 75ELDM bullets at just under 3,300 fps MV. Wifey's .223 is loaded with 53 VMax's at 3,250 fps mv. The 10 twist 6mm AI is loaded with 87 VMax's at close to 3,500 MV.
In relatively long range engagements, up to 1/2 section, just over 800, against rodents and the occasional yote the .224 75 ELDM (.22-.250 7.7 twist) & .243 87 VMax (6mm AI 10 twist) are about equal except the .22-.250 shooting the 75 ELD uses about 12 grains less powder for less blast, recoil, & somewhat better barrel life.
The 87 Vmax will also perform well in 8 twist rifles.