This is the relevant reference from the Books where Javelin Hurling is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
Drusus Rencius occasionally took me to see various portions of local games. These involved such things as races, javelin hurling and stone throwing.
Kajira of Gor Book 19 Page 111