So I found a Winchester .38 Special JHP round in my box of odd ball cartridges. The headstamp is WCC+P+/88. A quick Google landed me on this https://revolverguy.com/ammo-evoluti...treasury-load/ and answered my immediate questions. I found the back story to be very interesting.
For shits and giggles I simply googled for Winchester +P+ .38 Special and found this gem http://winchesterle.com/Lists%2FCata...FRA38110HP.pdf which begs the question - what entity/ies still uses this load?
FWIW, I do understand the Winchester link may just be a "Ghost of Internet Past".