Thanks Jimmy!
Bullets that have always been good shooters for me in Knight rifles are the 250gr Barnes Expander, 250gr Hornady SST, and the 200gr T/C Shockwave. That's the bullets I'd start with. Start with either two Pyrodex/Triple Se7en pellets or 90gr by volume ffg Triple Se7en loose and work up from there if you so choose.
Let us know how it goes!