http://www.federalpremium.com/products/rifle.aspx
I don't have any personal experience hunting with either one of these calibers. But looking at the ballistics I'd take the lesser recoil of the 7 RM. I have shot both and I prefer the 7 RM.
This linked didnt come up exactly the way i thought it would.So what i did was click on select caliber went to 7rm picked 160g nosler partition then back to select caliber clicked on 300wm clicked 180g nosler partition & clicked compare.both calibers should come up.