I replaced a 1970s Rem700 trigger that was gunsmith-tuned to 2# with a Timney which is set at 1.5#.
The improvement is not all that noticeable, maybe 10%-15% in the quality of the break. I would say that both triggers do not give the shooter a definite sense of exactly where the break will occur. You have to keep pulling it back as you maintain as small a hold pattern as possible and it will go off when it goes off.
If you want a more refined break point, look into the more expensive Jewell trigger.
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