mog75,
One of the classic examples of what Denton posted is the 7mm STW. When it was a wildcat, most fans reported 140-grain bullets getting 3600-3700 at safe pressures and 160's at 3400+. Safe pressures meant no "pressure signs."
When Remington started pressure-testing the more popular handloads the vast majority were between 70,000 and 75,000 PSI. Which is why Remington's 140-grain factory loads stopped at 3400 fps.
