I thought I had read about most primer problems (spp in 45, etc) but this is a new one to me. S&B 9x19 NX 15. I'm guessing it is their version of lead free. What isn't free is movement of the primer, I am afraid to pull any harder to decap it. The primer seems to be between a SPP and LPP but can't say for sure since I can't get it out. The flash hole appears to be smaller, but again, I can't get to it. Anyway, brass rats, be on the look out.