The 17 was designed by the Brits for a long tear drop shaped 7mm to compete with the 7x57 that was so much trouble in the Boer War... WW I popped up and they got made in .303 Brit. (Uncle Sam wanted Springfields, and got told to come back in a year or 3 and bought Enfields in '06 instead) POINT: .303 has the same rim diameter as the .300 H&H Magnum case. So instead of opening a 17 bolt, you just slip in a P14 bolt and you are there.
Mr. Weatherby used the 17, reportedly, to develop his magnums. So if you are anywhere close to the .300 H&H or .375 H&H length, should fit. Now the 17 magazine was built around the '06 so it is some work, but done many times. How heavy 8mm bullets you intend. The fast twist crowd that has to have the longest and heaviest bullets... maybe a problem there.
And how many rounds do you want. Many have had the magazine shortened to flatten the bottom of the stock... Slimmer, sleeker...
The "beware" is the Eddystone Enfields made at Baldwin Locomotive Works, owned by Remington, in Eddystone PA. This WW I era steel has been known to crack if a tight barrel is just removed by raw force. Supposedly, if a ring is cut ahead of the receiver relieving the "tight" .... No problem with Remington marked or Winchester marked (mine are Winchester... 14s) luck.