MAC,
Actually, right now quite a few recently introduced cartridges can be found, since most people trying to cope with the "shortage" buy the more popular ones.
I went to a couple of local sporting goods stores a few days ago, mostly out of curiosity about what could and couldn't be found. Two recently introduced cartridges that I found both ammo and new brass for at both stores were the 26 Nosler and 6.5 Weatherby RPM.
Also found quite a bit of .35 Legend and 6mm Creedmoor--but no 6.5 Creedmoor. Also found quite a bit of .260 Remington, a cartridge that's been around for a while, but isn't nearly as popular as the 6.5 Creedmoor these days.
The "lesson" here might be to that rifles chambered for those in one of those newer "useless" cartridges, or an older but not very popular cartridge might be more easily fed during our increasingly frequent "shortages."
