What kind of shells are these?

[Thor]

I used to use the all red plastic shells for ducks as they didn't rust up

[WickedGoodOutdoors]

They reload slick as snot.

Way back I used Actives for Ducks in the Swaps and they are great because they float and you can recover them.

Just go out and shoot a few at a cardboard box. You will find out what they do.