Max Pressure Cold vs Hot Pressures - How Much Is Too Much

I know I read it on one of the Tire MFR's sites, but don't remember which, but what I remember was trying to set the tire pressure at an ambient temp of 70 degrees. When temps are in the mid 50s the pressure will be approx 10 to 15 Lbs below the set pressure, but within a few miles rolling down the road they will be at the set temp and continue rising as the continue heating up.