Hello John,

Components:
I personally think that the .318 is much easier to feed with components, as you can use .30-06 Winchester cases to form them perfectly. This is an easy job for the advanced reloader and no neck reaming is involved.

Furthermore, at least in Germany we have the following bullets available in .330 diameter

DEGOL
207 grains SM spitz HP
210 grains SM RN
250 grains SM RN
250 grains SM spitz PP

Macapuno see link below
http://www.egun.de/market/item.php?id=3249191
They offer a 200 grains 330 dia bullet for the old Steyr M95

I think you are familiar with the Woodleigh collection

Actions:
Both could be made on the 98 actions.
Again the advantage of the 318 is, that you can use 5 round military stripper clips to feed the magazine. A standard 1909 Arg Mauser magazine will give you a 5 round capacity and in Mauser 98 actions or 1935 Brazilian no feed ramp work is necessary.
The 333 Jeffery needs much more work and preferably a new magazine box to get more than 3 round into it.

Best regards
Robert