Something is WRONG with that Danny...
i have owned 3 Dan Wessons, and still have 2... (dad wanted his old one back, when I found a second model 15)
mine, in DOUBLE action, only pull 5.5 to 6 lbs... and in SA mode, pull about 2.5... and both are only "wear lapped"
(the one Dad has is a tuned target revolver now)
Best advice - take it to a pistolsmith, and have him look it over!
might just be dirt... or the thing's been tuned by a moron...
good luck, and let me know what happens to it!