I had my 30-30 re-bored out to a 356Win. And I love it. Primarily shooting 220gr Speers for now. No recoil issues. Winchester still does their annual runs of 356W brass. I just bought another 200 rounds of brass off Powder Valley. And Sportsmans always has the 220gr Speers in stock for cheap. We used to harvest elk with 170gr bullets out of a 30-30 (short ranges as it's thick forests in Roosevelt elk country), but the 220gr 356W gives quite a bit more power for those uses.
I have some 250gr Beartooth GC cast bullets for my 35 Whelen that I was contemplating trying to load in my 356W this summer. Might require a modification to fit and crimp properly, but we'll see. Haven't started casting my own lead bullets yet, but the Beartooth bullets are great quality.