On the power subject.
My pro compact full length has been tuned down to 10.6 with express and domes are 9-9.5 easy to cock
the first K I bought is doing 11.2 with superdomes and just marginally less with express. I think its over sprung.
The second K i have is a sandwell one. Producing 11.7 with express and 11 with superdome. Cocking is easy.
If yours is reading highest with superdome I'd think that its also oversprung and cocking effort could be reduced