Are there any semi auto weapons in 6.5 Swede aka 6.5x55?

Yes. AG-42, later converted into AG-42B (also known as the Ljungman) is a semi-automatic weapon chambered in 6.5x55 previously used in the Swedish army. BAR has also been made in 6.5x55 but is very rare. Luvo makes a newer rife based on the AR10 design called LA-11.

There has also been an unknown number of prototypes of weapons in 6.5x55 including G3 and Galil.