I have two 7mm's. 7mm Mauser RB and 7x30 Waters that I'm stubbing to a 219 Savage. I can't seem to find any moulds less than 130grs. Won't the 7s' handle lighter boolits? I'd like to do some mouse fart loads with 100grs or less to cut down on the noise. Any suggestions? Are there any round ball moulds in that calibre?