Well, I shot the SX3 this past weekend. All I can say is WOW!
At 28 yds, the turkey head, on the target was gone. I then shot at 45 yds. I had 213 in a 9" circle, 38 in the head and neck.
I used the H-13, 3 1/2", #6 loads. After reading the positive comments about the #7 shot, I am going to try those also.
My poi was 3" higher than my poa. But on center of the target.