Called S&W today to order a recoil spring (none in stock), but they told me the gun originally shipped from the factory in September, 1990. Put 130 rounds through it today, 115, 124, 147, and 115 HP's - what a nice shooter. Focused on pinning the trigger, re-alignment, trigger reset, and then firing, Worked well but still room for improvement. Only hiccup was one poorly seated first round using the Promag magazine. Had to push the first round back to fully seat it in the magazine. Definitely a keeper - just need to find a couple more 8 or 9 round magazines with breaking the bank, and will look into the Milt Sparks summer holster. Did find Wolff recoil springs - 16, 18, and 20lb. I have no clue as to the difference so will hold off until communicating with a couple experts. Any help appreciated.