Hello all this is my first post. I have an excellent 310 cadet rifle on my licence here in the U.K. I use cut down 32/20 cases or Bertram 310 cadet cases with a lee 7cc scoop of Trail Boss powder , I have no unburnt powder grains low recoil and good groups for 25 yards indoor range. I did use unique to start with but as only shoot at short range the Trail Boss load is just right for me .Have fun Rook and rabbit