As I suspected it is a bit too firm for my officejet printer. Sometimes a sheet gets jammed because it is a bit thick to curl for the paperflow grab on through the exit. There is jams but is easy to pull out since on the exit.
I bought to make copies of a craft project for my Children's Church kids. It was a success and we made a Lion out of the Card Stock and a paper plate. The children really enjoyed making this project. The weight of the cardstock was excellent for the legs tail eyes and snout.