I would NOT use a JHP or a HP on any big animal, but would use a flat nose or SWC. Big animals need penetration, hollow points limit penetration. Overpenetration is not a problem in hunting because no one is behind what you are shooting at. If there is, you don't shoot.
Bob Hagel used swedged HP bullets that did not penetrate the skull on his bear.
The incident with the MT FWP Warden was the release of a Grizzly bear that had been darted then turned on him. The range was top of the cage down to the bear.
I shot a 200 lb mule deer with a 4" mod 19 in 86. I used 125 gr HP and have never had as much blood shot meat as with that animal. I clipped the spine shooting down hill and the bullet exited.
IMO the 357 from a Blackhawk, DW or L&N frames with 180 gr cast is a very different load than a 158 or 125 gr. Again bullet placement is everything.
Many deer, elk, ect are harvested with 22lrs.
Do you really mean Bob Hagel or Bob Milek, whose event was mentioned by .30-30-Remchester?
I recall Milek's article, but not one like it by Hagel. I did read articles by both men.
The outdoor editor whose account I read of the Montana warden shooting didn't mention the warden's name and said the final shot was in the bear's heart. But it was while releasing a bear being transferred.
There seem to be several versions of this event, or maybe we're talking about different shootings? Would a Montana member please contact that department and ask to speak to somone faniliar with the incident, or the warden, himself? He's probably retired now, but they may put him in touch with you. While you're at it, ask how they liked the M-66 with that ammo for their job. I suspect the ammo was chosen for shooting felons, not bears. If it was that very hot 125 grain stuff, it probably beat up the guns a lot.