I understand that .243 Win is common as dirt and somewhat unfashionable, perhaps because of that--sort of like the .30-30 used to be. BUT (the BIG butt), dirt and .243s do work very well for their several purposes....
I'd shoot if first and see if it "works." If so, either mount that sling and use it for a combination deer/varmint rifle for situations where you don't have to hump a long ways, or sell it to somebody who wants a classy, custom rifle for those uses, maybe with a slightly more modern and lighter scope and mounts.
But then, I LIKE .30-30s and .243s! This gun is from back when the .243 was "glamorous, new, exciting, high-tech cutting-edge!" IMO it deserves to be preserved to preserve that period. If it shoots.
