Who sells reduced power mainsprings for Pietta 1858s?

[Prairie Dawg]

Who sells reduced power mainsprings for Pietta 1858s?
I had one once, but don't remember where it came from.
Thanks
--Dawg

[Bull Schmitt]

Howdy Dawg,

I think VTI Gun Parts used to have them. I don't see them on their website but you might give them a call.

Bull Schmitt

[Slowhand Bob]

Just rumors of rumors but I have heard that perhaps using the spring from cartridge versions is a big improvement while remaining dependable.

[hellgate]

I know I'm late on this but you can just drop in a Colt '51/'60 mainspring into the slot and shorten the tip a bit and you will have a nice light action. I've done it several times.