Any short action will fit.
Not unless the Smith is chambered in caliber .270 Weatherby- and I have never seen one that was.
100-500 or so
Nice rifle
Yes
The full name of the cartridge is the .270 Winchester Center Fire. WCF. To distinguish it from any other .270 cartridge, such as Weatherby, Holland & Holland, etc.
According to the Weatherby website the twist rate is 1 in 10"
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.
Model dependent
No, you cannot use .270 Winchester cartridges in a .270 Weatherby Magnum chamber. The .270 Weatherby Magnum is a longer cartridge designed for higher pressures and velocities, and using a shorter .270 Winchester round could result in improper chambering and potentially dangerous situations. Always ensure you use the correct ammunition for your specific firearm.
100-1000 USD
500-600 USD
100-400 USD