I recently got a few hundred 38 Special brass from a family member. Most of it is Federal +P+ marked brass, with the FC head stamp. There are a few regular +P cases in the box as well. The story is that the +P+ cases were picked up at a police range back in the 70's when that was a typical police round. They have been stored since that time and never reloaded. My question- Is there a difference between the +P and +P+ brass? I have found several cases with "Federal" head stamp marked just +P, so I get the idea they are different. I would like to find the hottest load I can find for them using magnum primers and some JHPs. Just to keep around in case of chaos. Input from any of the experienced 38 Special reloaders would be appreciated.