Wad choice for fiocchi hulls Universal powder

I bought some 12s3 wads to reload Fiocchi hulls thinking it would work for most powders. Rookie mistake. It appears to be recommended if using WST powder, but not Universal. I have a few pounds of universal I wanted to try for trap loads as the numbers looked good. Even though the 12S3 is made for straight wall hulls, would it be a dangerous mistake to use the 12S3 wad if it was not recommended by the powder company.

 

The Claybuster clone of the Fed 12s3 gives the green light to use Fiocchi hulls, and Hodgden powder has the recipe for Fed 12s3 in their powder manual.