Remember this Sound on Sound article about loudness?
Here's the "unofficial" dynamic range database. Note that "dynamic range" is exactly, er, not what the issue is.
|Lou likes elephants.|
The EBU measure of loudness range is a measure of the ‘three-second window, gated K-weighted RMS variability’ of audio content.
Keep that in mind.
At all times.
The really really weird thing is that applying a limiter can effectively increase the dynamic range of a signal. That is it'll increase the RMS dynamic range, not the peak dynamic range.
Which is a really interesting way to think about it.