I was just proud they didn't stick to the elastic shell loops of the game vest when they got wet .   .    .     .   

Just a short follow on:

The Remington Power Piston one piece plastic wad was introduced into the target shell line in 1963. Two years later in 1965 Power Piston wads became available in the Remington Express line of upland and waterfowl loads.

Neat, thanks.

Another bit of shotshell history from 1947:

Remington introduced the Fold Crimp as the Remington flat crimp in 1947.  Along with much fanfare about eliminating "...blown patterns caused by roll crimps."   Later research discovered the blown or doughnut patterns were primarily the fault of the long card and fiber wad columns required when bulk smokeless powder was phased out during the late 1930's to the immediate post war years.  Within three years the paper disk with load data over the fold crimp was discontinued and load information was printed on the side of the hulls.

Link update: Remington1962 Plastic Shotshell Ad

https://gunsmagazine.com/wp-content/uploads/2018/12/G1062.pdf