I have tried many brands to solve a feed issue I had with the GSG. ALL seem to work the same. Even sub sonic. I use win wildcat most because they work best with my other shootables.
The manual says it's designed for HV if I remember but as above ,,,,,,
From the manual
D-01: Product Description / main features
Dear valued customer,
The GSG-1911 pistol has been constructed according to updated knowledge of modern
gun manufacturing for caliber .22 long rifle HV ammunition.
Because of the high bandwidth of caliber .22 ammunition we decided to adjust the
GSG-1911 to the high quality standard-ammunition as well as the HV-ammunition.
If you feed it, it will eat
(Except those friggin xpert HV's... I wouldn't denegrate a groundhogs death with those. Crap !!)