Can rem 6 1/2 small rifle primers be safely used in place of small pistol primers? I saw someone post that they were doing such and wondered about the possibilty of doing so. How does the pressure and cup hardness compare? I have a few thousand rem 6 1/2 primers I picked up before I found out they weren't recommended for use in .223. That coupled with a shortage of Small pistol primers causes me to look for a safe way to shoot the 6 1/2 SR primers. say for a plinking load that I currently shoot at 5.5 grains of bullseye. It's a pretty mild load so would say, 5.0 gr and a rem 71/2 primer be similar? Just wondering if anyone has tried this.