AEA HP SS 12ftlb tune?

Have any of you AEA HP SS Pistol or any of the other aea semi owners tuned them down around 12ftlb? I have other high end stuff for field target but am interested in doing one of the HP SS as a lower power plinker.

If so how does it shoot at this lower power? Would love to set it up for the cheap Crosman hollow point premiers.
I wonder what the power adjuster is on low? Any idea?
 
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