Mint condition but unused for some time.
Bought on Sunday from a forum member but did not test before leaving.
Set up my bench today to zero in the scope and it will not cock.

The cocking arm releases fine and the cocking cycle is very smooth. Then Click, click, click and it 'feels' cocked.
Upon release though, the arm is still under spring tension until returned.
Safety is not engaging.

Took it to the local (30 mile round trip) gunshop just now who initially said 'give me a minute. I think I know whats wrong' before disappearing out the back (as there was a pellet in the breech) but returned a few minutes later to tell me it needs to be seen by a gunsmith as they have no on site facilities.

Feeling a bit dejected.

Any help gratefully received.