Wes, I started the other way around. I started with pistol reloads and worked to rifle reloads and learned that for long ragne accuracy, you have to sort rifle cases. For my 9mm reloads I use all major 9mm head stamps from range brass but throw away crimped or tight pocket pieces like the S&B and RWS. I have no doubt that separating the brass would yield better accuracy, but for 9mm blasting, I simply don't need it. Stay safe shooting and reloading.
Chris