Couple of things.

I overlooked the 308 with 168 or heavier bullets.


Speed is not absolute - case in point - 308.


Do NOT call a rifle good or bad based on 100 yard targets. I have a couple rifles that shoot heavy for calibers in the .75 to 1.25" groups at 100....but group VERY well at 300 and further.

Personally, I would go with the 300 WM. Buy a slip on butt pad - shooting prone sucks with most magnums.