I haven't heard of too many "tricks", other than talking some gunsmith into working on the trigger (which most won't).
I've only had experience with an early (1971) steel .358 BLR, that I added a peep sight to.
I got 1 3/4" - 2" groups @ 100 yds, out of the box, so just took it hunting - never doing anything to it except clean it.