The Fig 8 OEM , is the same as the CB8118 by Claybuster and the DRRF8 by DownRange. The claybuster and DownRange wads are clones of the OEM and can be substituted.
On a rare occasion the CB wads will provide lower pressures than the OEM wad. The loading data will recognize this and call out the clone by number. Most commonly found when using WAA style wads.