A bullets sectional density is a far better predictor of how deep it will penetrate and how effective it will be. Unless you go up significantly in bullet weight then a bigger bore size is a handicap. As long as the bullet chosen has enough mass and is constructed well enough to penetrate on the game hunted. A 6.5/140 has about the same SD as a .308/180 and will give nearly identical penetration.


Most people don't really want the truth.

They just want constant reassurance that what they believe is the truth.