If stored in its original packaging inside something like a GI ammo box/can that has a good rubber sealing ring, in a place where the temperatures and humidity remain relatively constant, factory ammo can remain viable for decades.
I've purchased milsurp ammo in sealed containers which was produced a half-century or more before I got it and had every single round work. I also have a good many thousand rounds of assorted commercial "sporting" rifle and handgun factory loads purchased in quantity when it was offered at attractively low "close-out", "loss leader" or "discontinued production" prices, some of which goes back almost thirty years now.
It was packed into surplus GI ammo cans (with new seals) and a dessicant packet or two and placed on HD shelving units in a purpose-built storeroom room in our basement. So far, none of it seems to have deteriorated cosmetically or functionally to any noticable degree.
One thing I think it would be prudent to point out regarding the two most common .35 Remington cartridge options mentioned above and the Marlin 336: For safety's sake, stick with the 200 gr. RN! The 150 gr. "spitzer" was developed by Remington 'way back when specifically to add a bit of extra range and velocity to the round and intended for use in box magazine bolt or semiauto guns and their Model 141 pump-action rifles only.
The 141's tubular magazine has a unique spiral groove impressed along its length which kept the noses of those pointed bullets offset from contact with the primers of the other rounds in the tube. IMHO, stuffing any other tube mag with them is about as advisable as playing a game of "kick the can" with a hat-full of blasting caps.
