I don't think it's going to matter too much what bullet you use. At the velocities your going to get out of a 12" barrel they are all going to act pretty much the same. Use whatever shoots the best for you.
I don't shoot factory stuff in my 30-30 anymore, but when I did I found that any variety of 150gr shot better than the 170's out of my T/C. I used PMC a lot since it was typically cheaper and it shot great (approx 1" groups at 100yds with open sights). I also shot a bunch of Winchester's, but don't think they were from their Supreme line. Now for bear, I might be more inclined to use the 170's to ensure that I get good penetration. The 150's will work just fine for deer.
Good luck ... Crayfish