Have you tried the 7.5grain Defiants. They are superb in mine. And you can run them around 840fps.
You've done it now Neil, I've just ordered 1000, 4.52mm Defiants, to try. Fingers crossed they work in my EV2 Mk.2, or the Pro-Target maybe. We shall see. Regards ... Geek
PauL H. - Shotgoon
Brownings: 1999 Ultra XS; 2004 B525 Field; 2010 Maxus Hunter: Air Arms 1998 Mk.2 Pro-Target, 2001 Mk.2 Pro-Sport & 2003 S400C