There have been a zillion deer killed with the 30-30. It's a great round as long as the hunter recognizes its limitations. Typically it's fired through a lever action rifle and requires round nose bullets because of the tube fed magazine.
Hornady has came out with the soft ballistic tip bullets(leverevolution) that allow a much better bullet that flies better, faster and gives more range that is perfectly safe in tube type magazines.
Post pics of your rifle if you go that direction.