BLR triggers... cancel that... BLRs in general are a pain to work on.
I have polished a couple BLR triggers, the first took me a full day of remove, polish, reinstall, test, repeat.
Contrary to the little available knowledge out there, this can be done without taking the whole action apart (the timing of which can be a nightmare).
One of the design 'features' of the BLR is that the trigger travels with the lever, eliminating the pinch hazard (somehow - their idea, not mine)
The result of this is a trigger linkage that can be really squishy and horrible from the factory. The trigger actually presses on a lever and the lever engages the sear. Sear spring falls out every time you remove the linkage and even just seating the sear spring is a challenge in itself!
A spring is a simple way to bring down the pull, but to take all the creap out of that linkage is a tedious tedious task.
There was a smith in the Fraser Valley who had a good reputation for BLR trigger jobs, I'll PM you if I can find his name
@Small Lady