Gisselle reduced power hammer spring?

I'm running a Gisselle SD-E in a dedicated.22LR conversion. It would be more reliable with subsonic ammo with a lighter hammer spring.

Any suggestions on what to try? I called Gisselle and they had nothing to offer.

Jp?

Lakeside machine has a spring kit for the 22 bolt conversions and trigger springs. While their product seems to get good reviews. Their instructions or should i say lack of them, as well as tech support is seriously lacking.
You get 4 recoil and 2 hammer springs, a piece of paper that says cut to length, that's it.

JP has different hammer springs as does Wolf.