I actually have a 30-06 custom hollywood carbide sizer die, and you still need to lube the cases but not to the extent that a steel die requires. The lee carbide sizer that I have for 30 carbine, also recommends the lubing of cases and I do lightly lube them also.
I'm not sure that carbide dies would be the answer for other types of cases as they are for straight walled shorter length pistol rounds.
regards,
Graycg