Just because Remington discontinues chambering rifle in it means nothing. they do that all the time. Heck, in a couple years they will probably have 2 or 3 rifles chambered in it. Its not like all of a sudden you can't buy ammo.

I would recommend that you not buy cartridges based on popularity. Some of the best rounds out there arevery unpopular. Some of the most popular are completely over-rated.

I think the most prudent thing to do would be to reload for it nonetheless.