As cup/cores go they're pretty much the opposite of a Hornady RP. PowerPoints have far less exposed (OK, covered) Pb. So don't know why anyone would be surprised by the ST's rapid expansion at low-velocities.
Someone might prefer heavy for caliber bullets on lightly constructed animals. Example, 180 gr ST in .300 Savage. Some like to reduce MV for beginners or kids. Old STs are fine in such applications. Kinda like flat points designed for old lever guns.
We're smart enough not to load 250 gr .338 TSXs to 2000 fps and expect pulped lungs on ribcage hits, right?
