"50 grain WW Power Points"

Are these the same as the Winchester PSP's?

Yes I think they are but I am unsure today. Maybe Winchester changed the name and it's the same bullet, but it's possible it is a different one too. (It also possible I am confusing the name myself. it was a long time ago)
It's been a lot of years scene I got any now. That was back in about 1983 on and off until about 1987 or so. I don't know if they ever make them anymore.
The old one were 50 grains, sort of a spitzer but not real pointy. The jackets were fairly thick for a 224" bullet. My SAKO would shoot them into about 3/4" with it's best load of H322. Some Sierras were more accurate, but didn't kill the coyotes as well. The little WW bullet always seemed to expand and hold together and not blow a big hole through their hide Exits were usually about the size of a Nickel to maybe a quarter at times if they were close. It was just an excellent bullet for hunting hides for maney.