Before the match, the blacksmiths had only lost a single match in the entire season.
The team kept a steady pace for a long time, but Rospiggarna was able to pull away and win by 46-44 - despite Smederna getting to a fifth in the last heat.
The victory means that Rospiggarna is sixth in the table with twelve points, one point ahead of the Masars.
Smederna tops the series with 23 points.