Depending on how old the rifle is, it may have a trigger that is easy to work over. The three screw trigger is weill known for ease of modification. If it has a set screw under the sear engagement, the depth can be set and a smaller diameter round wire can be installed. My old Savages have pulls of about 2.75 to 3.0 pounds. If it is the later model, a smith can get a got pull for about half the price of a new Timney or Rifle Basix trigger.
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Do some searching on youtube and other sites. The old style spring has some adjustment but the wire is really stiff and can't be adjusted light enough. I used an old spinner bait wire for my trigger spring. It works much better. Hobby stores also sell the music/piano wire in 12" pieces.
