I have a nice Webley Mk3 in .22, and having just stripped and relubed and checked on the chrono, I find it`s only doing a little over 5 ft lbs. All the internals look good with a square section main spring fitted. I have not used a large amount of grease and the spring feels reasonably strong when cocking. The tap also seems a good fit and holds the air for a short while. Any ideas , suggestions would be appreciated.