A JSP is a JHP without the HP. Sierra calls a jacketed SP with a hollow point a Hollow Cavity. And a jacketed bullet without the bit of lead sticking out a JHP. Usage is the same as an HP. Whole thing has to do with controlled expansion.
"...penetrate and kill a bear?..." Depends on the shot placement and the bear.
"...modern match rifle bullets are JHP..." They're not. JHP's are designed to expand rapidly upon impact. An HPBT is not.
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