I have an S400 carbine 0.177, I have fitted the Rowan 10 shot mag, which works fine. The only problem I have is that it limits the position of the scope front mount, which means that my scope wont move far enough back to give me the correct eye relief

It feels like I'm having to move my head forward in an unnatural position to get close enough to the scope, otherwise I'm just seeing a big black ring.
Does anyone know if there are some kind of offset mounts to solve this, that would allow me to move the scope further back ? or else do I need to get a different scope with longer eye relief ?
Thanks
Mat