All my Parkers are 12ga. I have been using this recipe for about 7 years. Depending on how your press drops powder, mine drops 17.5 to 18 grains of Clay Dot, Claybuster CB4100 wad which is a 1oz. or 7/8 oz. I only have Remington Nitro hulls and use usually Winchester 209 or Cheddite 209 primers. According to Alliant's web site the pressure is between 7,000 & 8,000 lbs. and right around 1150 to 1200 FPS.
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