Bullet weight for hunting

[GaryM]

So it looks like the 125gr range is the prefered weight.
I guess that is what is throwing me off. I am used to calibers/twists that are best in a limited range such as .223 1/9 twist and 65-69gr or 223 1/12 twist with 45-50gr (Just examples, not neccessarily 100% accurate). The idea of different weights for different velocities is new to me.
I guess I need to drop by the reloading supply places and look for me some new bullets!
Thanks again!