They only look strange to you because of your age.
I am in my 50's and remember buying wadcutters being too cheap to fuel full load .357's. I shot the 158 grain lswc in my security 6 with zero leading and very good groups!
My brother shot a dozen of these wadcutters in my 3" SP101 with no leading. He couldn't comment on the accuracy of the loads since it isn't his gun, so I will slap together another 50 to run through my security 6 before making a pile of them.
Glad I kept the mould now.....