t/c223encore,
The reasons they are saying the 110 grainers are too light are a couple:
First these bullets are very short and stubby for a .308 caliber bullet. Some rifles will not shoot them well at all due to either the long jump from case to throat or the twist ratio of the rifling may not stabilize, or both.
Second, with a short, light bullet for caliber they don't hold course in the wind or trajectory nearly as well because the Balistic Coefficient is so low. Yes, a 55 grain 223 is a lot lighter but the BC would probably, I'm not taking the time to look it up right now, be much higher. And, the 55 grain bullet is an optimum weight for that caliber. That leads to a better flight path.
It's not that a 110 grain VMax won't knock the snot out of a coyote when it hits it but it is harder to hit it at longer distances with this bullet.