Hard to go too wrong with a .308 Win, in a Model 70, IMO.
Not the fastest, slowest, anything-ist round out there, just a good solid performer and capable of being used for pretty much anything in North America. Pretty flexible for a handloader, and a guy could do a lot worse as an 'only' centerfire hunting rifle.
The "Featherweight" monicker got put on it back in the day, and while it ain't a lightweight from the perspective of a goat hunter that packs his kit in and out of the boonies, it was lighter by a bit, than the standard model. Whatever. If you were concerned about the weight, you'd not have considered the rifle. Weight is a good thing, when it comes to making for a civilized feeling gun to shoot, too.
If it matters, the differences between the Std. and Featherweight were the use of Aluminum for the bottom metal, a slightly skinnier barrel, and a hole in the bolt knob.
Not much.
Oh well, fewer cookies, more walking, you won't notice the weight.
I like the one I have. I'm biased though, as it came to me from my father, who bought it new in 1954 or 1955.
Most of the 'CRF is best" is a crock of hooey to stir up discussion in the gun rags, which, if not being stated by folks that were simply being willfully obstinate, was pretty much all about trying to cause the readership to come back next month to see what who said about whatever got put up the month before...
If you ever find yourself hanging by your heels in a tree, trying to quietly and slowly close the bolt on a round, please, do tell us, but pretty much all the supposed advantages don't amount to a bit of practical difference.
Cheers
Trev