Mad Dog:
As "worth" is predicated on condition and rarity in a 99 it`s hard to say what it`s worth. Plus, everybody`s view of condition is subjective. There are some gun blue books that may help you out .
As it`s a .303 i hope you hand load as i don`t believe there are any commercial loads around. More searching of the web might turn up something though.
" The best part of the hunt is not the harvest but in the experience."