I would appreciate some suggestions to cure a fault that has just appeared on my wife's HW50.
To set the scene: several months ago I replaced the Perfekt trigger unit with a Rekord unit and installed a Tinbum guide set to cure the twang. The original spring was retained and the guide length adjusted to match latch rod as per instructions. The Rekord safety catch was omitted as the rear block is not machined to accept it. All was fine and several hundred pellets have been fired since.
I have been shooting it today and noticed that the first stage travel is not behaving normally. After cocking the action the first stage works against spring pressure as usual but if I release the trigger blade rather than taking the shot, the spring pressure has gone, leaving the blade "floppy". I can still take up the slack to the second stage and fire the gun or I can re-cock it which restores the spring pressure.
After a little research I thought that adjusting the rear screw clockwise to apply more spring pressure to the lower sear should resolve the problem but it didn't. As expected it just made the trigger heavier.
If I remove the trigger unit it all works fine. The fault only seems to manifest itself when the mainspring load is applied to the trigger. If I break the barrel and use it to partially relieve the load on the trigger, the first stage pressure is restored.
I also have an HW77, so I can try substituting triggers but I don't really want to get into that if somebody out there already knows the answer.
In anticipation....