221 brass is one of those calibers, that when Remington makes a run, you can find it just about anywhere. Then it gets harder and harder to find, as the supply dwindles, and when the demand gets high enough, they make another run. When the 300 Whisper became popular 8-9 years ago, it became almost impossible to find. Then Remington made a run of it, and it was everywhere. When you buy it, get enough to last a few years. gypsyman