Unfortunately, as with most everything else, the “new” management at Remington has screwed up the Corlokt.
First, there was the ObamaAmmogeddon, which roughly coincided with the Freedom Group taking over Remington. During this time, Remington bullets became scarce. Eventually, a trickle has become available.
Problem is, instead of being the most economical hunting bullets available, they’re more expensive than similar competition. Sierra, Hornady, and Speer are all cheaper than the poor qc Corlokts.
About two years ago, when the .30cal (.30/30) and .358 (.35Remington) Corlokt started showing up again, it was obvious that they had been changed due to lack of jacket “scallops”. This was one of the unique features of the Corlokts and contributed to its excellent low velocity performance. I’m not sure if the tapered jacket is still used. This was one of the earliest methods of securing the jacket to core, and remained effective for nearly a century.
MidwayUSA usually has the Remington components if they are available. Remington is not committed to supporting the reloading market at this time (again). So, mostly what we get is seconds, or culls. If anything.
Like has been previously mentioned, the Sierra 200gr RN ProHunter is the best alternative. And it’s available, and less expensive than the Corlokts.