0.223 Slug in the 20, 30 gr range

Hello to all, i just barreled my p15 with a 22lr barrel, and from my test i can shoot 40 grs bullet to 238 /240 m/s (820 fps)

from my calculation i need slug around 28 grs to shoot them to 275 m/s (900 fps)

i come from NSA and ratsniper and i don't find bullet in 223 in this weight range

can someone help me to find what i need please 



thank you in advance

Thierry
 
I do not know of any light slugs for that , Of all the molds I have in .22 caliber noe makes a mold in 30 and 38 gr and MP makes a mold for huben and is about 36 grains 

google MP molds and NOE molds it is all I can think of , Lee makes one but again it is even heavier at 50 gr , how about , using a heavier hammer spring in the p15 , just unscrew plug and go a stronger spring and shoot the heavier slugs LOU



pm me if you need a stronger spring