I second the motion for cast bulelts in the 30-30.
Sometimes they take a bit of tinkering with to get the best results, but they will work. However, I strongly suggest that if you go that route, then get the equipment and make your own bullets in the proper hardness. IMHO, many commercial bullets are way too hard for hunting use.
My preference in jacketed bullet falls with the 170 gr. weight. I think the Speer is the most streamlined in shape of the flat nosed 170 gr. bullets, but any of them will do a fine job on deer, be they Whitetails or Mule Deer.
Any of the powders already mentioned will do just fine.
Paul B.