Makes a huge difference if the 300Wby you have is a Mk V or a VanGuard, in what other calibers you can swap the barrels to get into. MK V's are a longer reciever and ex: acccomodate 308 dia bullets the VanGuard will not in the longer or heavier bullets in 300 Wby.
MK V's, like the WW M70 Safari grades & other similar receivers capable of handling longer than 30'06 ammo are sometimes called "Magnum Length"...and will handle the 375 H&H length ammo etc.
Remember Aesops Fables of the "Scorpion & and the Frog's" crossing the river...
... we must hang together, or we will ALL hang seperately, Ben Franklin..
Those who fail to learn from History are doomed to repeat it,Santayana