Well, it seems that you have figured out that there are about a dozen good sound deer cartridges for the Contender carbine. alan in Ga said it pretty good, and I would add the 7-30 Waters, which you said you already have. I think that you can ream the chamber to "improved" if you want a little more. Same true for the 30-30. The most important thing i could add is for you to just pick your favorites, and use them. You can't go wrong if you are shooting something you like, and nothing will work if you are shooting something you DON'T like. Wallacem in Ga