Gray area say use common sense.
You look for signs of over-presure, and consider how well any particular pistol supports the brass. Some chambers work well with CIP standards, I imagine. I've read here at TFL about some pistols with lesser support, so the SAAMI standard should be better.
Granted that I'm mostly rifle-oriented, but a reasonable rule of thumb is to use "hot loads" for situations where you don't shoot that load very much. A deer load, for instance; in pistols, it would be your carry load for self-defense.
For punching paper or tin cans, there's just no point in creating the extra heat, stress and wear of full-house hot loads.
A Delta Elite full of hot loads is a wonderful self-defense package. If I'm gonna "work out" and shoot a few hundred rounds of practice, I'll use a regular Gummint Model .45ACP with IPSC loads.
$0.02, Art
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