Can someone with a brocock bantam hi lite 22 cal advise...

https://www.airgunsarp.com/2017/08/11/reviewing-the-brocock-bantam/

This review states they were getting 20 fpe at the low setting. You can back the hammer spring tension of a little to get it below that 20 fpe your looking for.

mine does 845 fps on low with Crosman 14.3 (22.7 fpe) so would need the hs adjusted down some. It shoots them at 925 on med which is what I shoot it at the most.

My buddy said his was doing 820 or so on low with same pellet

My .22 Hi-Lite Beech (purchased new from AoA 2-3 weeks ago) has only TWO power levels as spec'ed some places, not others. It gets 22 foot-pounds on low power. Don't know how reducing the power may or may not adversely affect efficient function of the Slingshot hammer/valve system, but assume it might.

Two power level's here also.16gr predator's 905fps on high.

mine had 2 power levels also 18 gr jsb 880 powers 2 was 810 if I remember right