500-600 USD
100-600 or so
Yes
A 270 Weathery will shoot any standard 270 bullet. However a Weatehrby Magnum will not. The Weatheby Magnum is like a Winchester Magnum which is a shorter and fatter cartridge.
It can only safely accept the 270 Weatherby Magnum if that is what it is chambered for. If you want to chamber it in some other caliber than get a new rifle. Just because two bullets have the same diameter bullet (270 or any other caliber) does not make it safe to fire it in your gun.
No known source of information to answer the question.
No published sn data I know of.
The basic Mark V is about $900 in excellent condition. Some magnum calibers are higher. Do not have a listing for left handed version.
Yes
Not unless the Smith is chambered in caliber .270 Weatherby- and I have never seen one that was.
100-500 or so
Nice rifle