Good info guys, thank you. I though that regulators would help with consistency-precision by consistently controlling the pressure delivered to the chamber. I do notice that I get better groups with the tank below 2,200 psi. I'm going to dial the hammer spring tension down to 10 and then 8 to see if that shrinks the groups with any particular pellet, I'm mostly using JSB Diablo pellets between 23-36gr . Maybe I'll try some of those FX hybrid slugs. I just never see anyone winning any competitions with the AF guns, and multi-shot would be nice for quick follow-up shots. I guess I'll try a few things to see if there's any improvement, but for now I just have to live with the iguanas laughing at me and giving me the finger. How humiliating!