I'm nearing the end of load develpment for the 200 gr Partition for my 30-06 Ackley Imp. I first ran some 300 yard ladders. Then, picked some likely candidates and verified them at 300 yds. Today, the weather was dang near perfect for such a test; sun at my 6, temps in the 20's to low 30's, wind light to variable (nothing over 2 mph). I completed a seating depth test, settling on .020" off the lands. It gives me a 10-shot 2.87" group at 300 yds with an extreme spread of 23, average vel of 2853 fps and an SD of 8. My load is 68.4 gr of H1000, hit by a FEDERAL 210MATCH primer in Winchester cases. I'm thinking of trying different primers to see if I can improve on it but I started thinking, "Should I?, it's pretty good now". Besides, 200 gr Partitions are not cheap. What think theee?