Quote Originally Posted by 05rw View Post
Just found the no te60210 on the underside just after where the stock finishes. I think this is the serial no.
That'll be a .22" Meteor MK3 then made between 1969 and 1973.

To be Honest shooting at 57 yards with a .22 Meteor would be a challenge to say the least.

Tuning a Meteor to 12ftlb's involves machining a new piston head with less lost volume, increasing the stroke a little and fitting a better spring (Titan XS works).
You would also need to tighten the barrel mounting to breach to stop any latteral movement.
You would also be restricted on what pellets to could use, as the Meteor barrel is 5.6mm not 5.5mm as most .22" pellets are now.

Starting with a better gun would be the best bet and could be cheaper in the long run.

Hope this helps a bit

All the best Mick