Hi Donald,
Have a look in the Competitions section of this site for the Muscle Power League - if you have a target rifle or pistol that requires muscular effort to cock rather than a PCP or CO2, the MPL is an excellent starting point. Otherwise, have a look on the NSRA website - they are the governing body for match shooting in the U.K. and will point you in the direction of a local club that participates in postal or shoulder to shoulder events.
Kind regards,
John
Currently looking for Baikal Makarov pistols with the following prefixes to the serial number: 98, T01, T09, T21, T22
Prefer boxed or cased but will consider loose examples too.