35 Rem. is a great caliber.
I own a reloading component manufacturing business, and in the last 2 years, orders have been crazy. Some folks hoarding? You bet. What I had to do is concentrate on making the most popular items to try to keep up with demand, and some of my less popular items have been on hold for 1+years, as I do not have the time to produce them.
Same with the ammo manufacturers. In order to try to fill demand for the popular stuff (223, 9mm. 45acp, 30-06, etc.) the small quantity stuff like 35 Rem., 257 Rob. etc. is placed on the back burner. Some of the small quantity stuff was produced on a "seasonal basis" before the scare happened. Now, you may not see it for some time again. 22LR is another story...