According to one of my books the .35 Remington was introduced in 1908. Back in those days, and lasting up to WWII, Remington had a line of cartridges for their rifles to directly compete with Winchester.
The .25, .30. and .32 Rem were direct rimless counterparts to Winchester's .25-35, .30-30, and .32 Special. The cases were different, but the calibers, bullet weights and velocities were essentially the same. The Remington rounds had the advantage of being able to use pointed bullets, due to the design of the Remington rifle magazines.
The "stand alone" round was the .35 Remington, because Winchester didn't have a round to match it, directly. And, despite its paper ballistics, it hits deer like the hammer of Thor.
After WWII, the .35 was chambered by Remington in it new series of rifles, for a while, but was eventually dropped due to slow sales.
What kept the .35 Remington alive for a few decades was Marlin. For some time the only new .35 Remington rifle you could get was a 336 Marlin.
Later, interest in the .35 Rem increased, due to people shooting it out of T/C Contenders. IT's a good round, more power than the .357 Maximun by a significant amount, but not as powerful as the larger .35s (.358 Win, .35 Whelen, .350 Rem Mag, etc)
The rounds biggest "drawback" is that it is made using the original turn of the century Remington case, which uses a smaller (.460") size rim than the now standard .473" rim derived from the Mauser x57 case.
If I had 50 cases (even boxes, I assume a case is a 20 round box), I would buy a Marlin. what is a case? 200 rounds x 50 = 10,000 rounds.
Pretty sure the OP is talking about 50 (or so) individual pieces of brass, not cases of rounds. Generally speaking, in the US a "box" of rifle rounds is 20, and a "case" is 1000 rnds in whatever box sizes are used. Some rounds do use a 500 count case, but usually its 1,000. Other nations do it slightly differently.