I did find maybe three shot before the grud ring on mine using RWS 1075 caps and triple 777.
I did favor Goex 3F powder 115 grains with the silverlighting 300 grain bullet or Buffalo SSB 325 to 375 grain HP bullets
I would never of sold the gun if I could have used BH209 powder in the gun,I did replace the gun with the CVA Optima thumbhole set up GUN SHOOTS GREAT