I have an older Sako with a set trigger. On it you adjust the non set (first stage/single stage or whatever you want to call it) and it does not affect the set trigger weight. The only way to adjust it that I know of is by a gunsmith.
If you look in the sako book for model 75 and 85's it says the same thing but I do not own a 75/85 with a set trigger only the standard trigger.
