I RESEARCHED THIS A WHILE AGO TO MAKE SNAKE SHOT FOR MY SISTER WHO LIVE OUT IN THE DESERT. 00 WAS THE SIZE FOR THE 32. YOU JUST BUY REGULAR EMPTY PHARMACEUTICAL 00 SIZE CAPSULES AND FILL THEM WITH SHOT, GLUE THEM SHUT, LOAD INTO BRASS WITH GLUE ON THE BOTTOM CAP TO HOLD THEM IN THE BRASS. I LOADED A HUNDRED FOR HER A FEW YEARS AGO. SHE HAS KILLED SEVERAL RATTLERS AROUND HER HOUSE WITH THEM. BUT THEY DO NOT LAST LONG IN THE CYLINDER. VERY EASILY BROKEN. JIM P