When I bought my 17-4 in 1984 it had a ****** DA trigger pull. I took it to Bob Chow in San Francisco and he told me "yes the trigger pull is not as good as it should be" and did a trigger job and action cleanup, charged me 60 dollars. The trigger pull both SA and DA is slick as can be, the timing is perfect etc. I have since put about 15k rounds through it and it is still a joy to shoot. Best 60 dollars I have ever spent. If you know what your doing or have a good gunsmith do the work a trigger job and action tuneup is worth it in my opinion.