I own several .357 SP-101's, and all of them still have stock triggers. They were stiff when new, but smoothed out after a few hundred rounds. The newest is from 2008, so they are pre MIM. One of the 2.25" 101's has been my primary for work since '08, have shot several perfect scores with it.

I also briefly owned a recent production .22 SP-101, the trigger on it was very heavy and never got better. Even after over 1,000 rounds it didn't smooth out. I eventually sold it off and replaced it with a Model 18. The Model 18 has a much better trigger.

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Wheel guns are real guns.