I hunt with a 300 WSM and don't recall a time when I couldn't have bought ammo for it on any of my Western adventures if I had lost it. Meaning, I flew into big towns almost every time, went to a reputable gun store (not all big box stores), and remember seeing 300 WSM on shelves on each occasion from Kalispell, down through EL Paso. Now, if I had lost it when I got to my final destination, like Baggs, WY, Cloud Croft, NM, Yaak, MT, etc it might have been harder to get but I could have gotten it on the drive in felt like it was somewhat obtainable with a decent drive.