Hate to argue, but comparing the 2 calibres quickly on the winchester ballistics calculator with the same weight bullet of the same type, they aren't even comparable. Maybe if your talking about the trajectory within 200 yards? 7RM is faster, flatter, harder hitting by far and bucks the wind better….
I'm familiar with the ballistics. The poster didn't ask what the difference is, he asked what makes one a better choice for hunting ungulates. For general use, I don't think the difference makes a difference. For ranges past 400 yards, I'd pick the 7RM though.


















































