I had same setup HW100KT 177 , a and m cylinder and mtc viper 10x44 . Got 6 mags with the cylinder and saved a hell of a lot of weight. You will find the rifle balances out perfect.
Now running new AA S400s in 177, not had it out yet but when I'm home in few weeks I'll be over the perm. I looked at the regals but heard rally bad things about them. The older huntsman is the one you wanted if was daystate you were after.
I had the wolf but weighs a ton and no good for me where I'm climbing and moving all the time.
You can get a reg fitted and up shot count even more