I have some Remington SP-10 wads..... These wads will work in the old Federal brown plastic hull when it is cut down and the old red Alcan 10 gauge hull when it is cut down..... I like to use a 12 gauge card wad in the bottom of the SP-10 plastic wad as a spacer.... In the training video that is attached to this string the instructor is using a 16 gauge card wad for a spacer in the bottom of the SP-10 wad..... the 16 gauge wad will work but the 12 gauge wad works better for me BUT NOTE I am reloading on a PW Mag-No-Matic which is like reloading on a rifle reloading press.... and I glue the primer into the primer pocket with finger nail polish.... posted by Jent on July 8 of 2021.