Trying to hot rod performance in a .30-30 lever action is a lot like trying to soup up a 1988 Ford Escort. Sure, it can be done. But why?
The "performance envelope" on the .30-30 hasn't substantially changed in well over 100 years. It still does what it was designed to do. It kills critters at reasonable ranges with reasonable shot presentations.
Stay within those parameters with a 170 grain factory cup and core loading (or similar) and rock on.