Another "vote" for Leverlution. But nothing wrong with the long standing 150-170 grain flat nose stuff that has been being used in 30-30 tube magazines for 100+ years. Hunters across the US have killed a many a critter with that stuff.
I no longer use my 30-30, but instead a Marlin "Guide" in .444 Marlin. Arguably not the best of the .44-.45 caliber rounds but this is a handy dandy short rifle for the tree stand, heavy woods hunting that I do.