Just put together a Park 93 with new springs and seals and it's running at about 10.2 fpe. Tried several flavours of pellets but this is the best I'm getting after about 500 shots

I'm reluctant to add pre load as it's already intense.

I've put Renolit red rubber grease on the two mainsprings and I think this is slowing it down a bit.

Can anyone recommend an oil/grease for the mainsprings please?

This is what I have to hand..
Quantum Hot Sauce
Napier Gun oil



Thanks
Simon