I have a Brno 21h in 7x57. It has double triggers. When set, the trigger pull is very light. When using the trigger un-set the trigger pull is horrid. Can anyone offer some guidance on how to adjust the trigger so it is decent in the un-set mode? Thanks.

These are not an easy matter of just turning the adjustment screw.

They CAN be stoned to give an acceptable "unset" pull.

This has been discussed previously, so you might get some pointers by looking it up