Ok. I questioned what he was doing and got the following reply:
"I was having a hard time getting the pressure down from my original start of 18k. My goal was to get under 16K and then go from there. Most reloaders feel that getting 11,500 into the 15K is in the safe zone for the psi. Yes for 3" shells (11500 psi), and well under for 3.5" shells (14000 psi). The only reason they have the specs different is because there are old guns out there with 3" chambers. If you're shooting a gun made since the mid '70s, it has been proofed up around 20000 psi, so you are not going to be shooting anything that will hurt you or your gun if you go up a little higher than SAAMI. International CIP specs call for around 15000+ psi for both 3" and 3.5" shells, by the way.
Now I have my loads in the 12K and I'll settle for that."
PS. I wouldn't be shooting them out of anything I own.
