The .38 special "super police" load was a 200 grain round nose lead bullet sailing along at a leisurely 600 FPS
I remember when Winchester used to sell these. I believe they were part of their "white box" line - although it's been too many years to say that for certain. Also, if memory serves (and it may not), they came in a nickel plated case. One thing I do remember, is that they were not a +P loading. I bought a few boxes just for the novelty of it. Shot most of them through my M60 snubbie. Too bad I didn't have a chronograph at the time