Webley mk3 power?

[mrgeoff]

Picked up a webley mk3 rifle, dating about 1961 I was told.

I gave at a strip and re-lube as it was slightly twangy. Chronyed it, and just over 6lbs.

Not that impressed, the piston seal is good, it does seem a bit over sprung though.

What sort of power should I expect? It's still a little twangy, not sure if if needs a bit less Spring though.

Ps, it's a 22.