soak, clean and brush the chamber very well w a bronze brush, Wolff has a variety of recoil springs. I think I run 7lbs for standard velocity, 7.5 or 8 for minimag, can remember now, get springs 6.5 - 8 and try them.
One of the very best guns Smith ever built (in the old days, not now)
DW allll the way
I have various Dan Wessons, the majority are 9mm. they do 9mm the best. I had a few Les Baers and Colts and much prefer the DWs. My main steel challenge and USPSA gun has ~50,000 rounds through it, shot it for the last 8 years 2x months in matches that run ~250 rounds each...