Compact 500mm .22 M3 - request for efficient Hades 15g tune

Hello Everyone,

Much enjoying the Compact 500mm .22 M3! Successful at setting desired speeds from light slugs to pellets. But the efficiency of settings is in question. Seem to be wasting air.

Can anyone recommend an efficient center point tune for Hades 15g? Goal is low setting of 700fps and high of 900fps. Does it exist? Set to 800 and then easy to adjust up or down. Mostly inside warehouse and barn shooting- 20 to 40 yards.

Take care,
k
 
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