Ithaca375
I'm not familiar with Nosler brass, but Norma brass is very good quality, I'd try that first if possible.
You wouldn't think that the Arisaka action would be long enough to shoehorn in that big Jeffery round, but hey mate if you can then you will certainly be a first from what I know of if you do! This action is extremely simple to field strip (only 5 parts from memory?) & extremely tough if you have a good donor action, even P.O. Ackley couldn't blown the darn things up!
Have to agree with Tinker & Grandveneur, this cartridge is a thumper - on both ends!
Best of luck mate, hopefully you'll be able to post your progress as you go.
Looking forward to the next instalment.
Cheers