Yesterday I loaded some 327 Federal Magnum using Xtreme 100 gr LRNFP at .313. My max cartridge gauge is at spec of .312. I happened to catch that rounds would pass the gauge not long after loading but later would not pass, because the bullet was too big. They did fit in both guns either way, so the standard trick of using the gun cylinder for a no-go gauge is going to have to do. However, I am considering having my gauge reamed to .313 or .314, since 95% of my loading for 327 is with lead bullets really designed for 32-20. What I am trying to catch is any case bulge near the head or a bulge from a bullet seated off axis.