It looks like a fine round for the eastern woods but it will never compete with the tried and true 30-30 or 35 remington which everyone and their mother has back east, I would rather see marlin chamber the 358 winchester as it's more versatile........Kudo's to Ruger for chambering the 358 winchester and I like what I hear about this new 375 Ruger. I'm glad there's at least one gun manufacturer left that has a clue!!!!!
I like the ballistics in a lever, but they'd only be available in factory loads. Handload this one with FN bullets, and you start losing all the performance you bought it for. I'm a fan of the 308 Win in Savage 99's and even the BLR, but I can use about any bullet I want. Measure Marlin's 308 against the original Winchester version, and it suffers for lack of versatility, even if performance of the factory loads are similar.
Yes I believe that they are really stretching things a bit with all the new calibers. Not that I don't like to see new stuff but I rarely actually buy any of it.
Now if a nice handy lever action in a higher velocity .30 caliber is what you are looking for by all means check out the Savage 99.
Mine in the C version in .308 is my favorite deer rifle. It will shoot at least as well and I bet, better than many bolt actions. Mine is at least MOA (there are better shots out there than me!!) with factory federal ammo. Not to heavy to carry, reliable and beautiful.....