Don't know why, but this jogged some memories for me....
I recall in the 1970's when there really were not ANY reliably expanding JHP's for the .45 ACP.
IIRC, one of the very first was Norma, with a 190 gr JHP, and it was sort of a 'truncated ogive' to help with feeding issues. Sorta recall a George Nonte article where he went to a hunting preserve and shot a not-large Black Bear with that load. Yes, it caused the demise of the bear, but I seem to recall the recovered bullet(s) showed very little expansion. The jacket on those early Norma bullets was evidently pretty stout.
Within a year or two, more and more JHP's started showing up as component bullets and ammo, but if you really wanted semi-reliable expansion you still had to drop bullet weight, like 185 to 200 gr. stuff, and run them hard.
The Speer 200 gr 'flying ashtray' was much sought after, but still had to be driven pretty hard to work.
I recall actually pulling some Winchester 185 gr Silvertip JHP's (not available as a component at the time) and loading them pretty hot.
I shot a deer at about 15 yards and upon recovery and retrieving the bullet, was quite disappointed. Cavity plugged with hair and fat and almost no expansion. Never felt the same about .45 Silvertips after that.
All defensive handgun bullets have come a long way.
Agency that I retired from is in it's ~20th year of using the .45 Speer 230 gr Gold Dot, and it's performance has been very effective and reliable, with reports of near-perfect expansion and stops.