I also experienced inconsistent groups with my Encore, I tried everything skb2706 listed and probably spent $450 on different reloads. In the end, it was the 1x over-sized hinge pin that made the biggest difference, not even a trace of slop in the hinge now. The over-sized pin will likely need some extra, yet mild persuasion to get it in. I installed mine by leaving the factory pin in the hing assembly, then used the new 1x pin to drive it out, the 1x required light tapping.
I got mine from...The Guy whom we can't name. Just search Google for "Oversized Hinge Pins for TC Encores".