I am a great believer in the 35Rem Marlin336. I bought some Buffalo Bore 220gr Rounds and compared them to the 30-06 Rem. 220gr Corelokt ammunition. On Thornily Stopping Power Graph or formula, the 30-06 220gr starts at 119 points of stopping power at muzzle and goes down to 81 points at 300yds, 112@50yds, 106@100yds, 93@200yds and then 81@300yds.
The 35Rem 220gr starts at 118 points of stopping power at muzzle and goes down to 82 @300yds, 111@50yds, 104@100yds, 92@200yds and then 82@300yds.
The 30-06 is faster but a smaller diameter .308, the 35Rem is a little slower but with a bigger dia. bullet .358.
I would never buy a 30-30 if the 35Rem were available with the data above you could go afater larger game like elk (if close enough) something you could never do with the 30-30. Anyway thats my humble opinion.
fknipfer