Hello, can anyone tell me what powders they have had the best luck with in the .204 Ruger ?? I have been trying that 8208XBR and the best groups are about 3/4". I am using 32gr. nosler spitzers & nosler "shots" 32grhp. I have a howa heavy bbl 1 in 12 twist. ANY suggestions are a great help, Thanks in advance !!