For those who don't want the hassel of brass, special, very expensive dies and wierd bullet sizes, the .35 Whelen will about duplicate the .333's factory loads and then some, without stressing things, with easily available bullets as light as 150gr. or up to 300gr. and factory dies - but then, it wouldn't be a .333 Jeffery, would it.

Judging by the picture of the rounds, with the Whelen's bullet seated out just a bit, the oal's would be identical or whatever the owner wanted, within the confines of one's chamber, that is.