meltoc,
sounds like you've made your mind up but I suggest not using RWS ammo as it is too fast - occasionaly going supersonic. We won't use it in our Bleikers as we've experienced this every time we try it and actually seen the result of a supersonic shot during testing at Eley. It seems to work for other barrels but we find it does not suit Bleikers.
I'm using centre X or Midas with good results - barrel now 9 years old circa 8k round pa.
Not sure a dodgy ejector is a good selling point - I've had 3 on mine and they do play up (wear) my last one lasted 6 years though.