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I think the hammer spring is the same weight as for the 9mm (32lbs.). I believe the .40 recoil spring is 20lbs. whereas the factory recoil spring for the 9mm is 17lbs.

I'm not totally sure about these numbers, just going from the top of my head. Check Wolff Springs and do some thread searches you should be able to find what the exact weights are.
 
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