Mehavey,
You must have missed, way back in his second post, that the OP said his case heads were coming out +0.003" wider in diameter than before firing. That's a very strong pressure sign, which is why I asked about the load and suggested reducing it.
In his description of the load, he says the bullet is very close to the lands. Many people think you actually have to contact the lands to get the pressure increase associated with such contact, but you don't. Dr. Lloyd Brownell's study of pressure in the 60's showed that, beyond a minimus, pressure rises in an s-curve shape that approaches the contact pressure continuously and is almost there just before contact is actually made. This can cause anywhere from about 20% to 30% increase in the pressure rise in some guns and bullet and powder combinations, as compared to having some normal jump, and that's what I suspect happened here. A load that should be 61,000 psi with jump could get up into the proof range, and be 73,000 to 79,000 psi.