Bought a Yukon a couple of weeks ago. Did an extractor tension test on it, got it to 30 ounces. It has stayed at that. It runs with 10mm from 175 swc at a thousand to 200 wfns at 1175. Friend of mine asked if I had tried any forty’s. So I tried them today. Ran perfectly in either Wilson 10mm or 40 magazines. I did replace the sear spring with a John Harrison which dropped the trigger pull from 4.5 to 3.5. The pistol has become my every day carry. I am impressed with it obviously as it has parked my Sig C3 which I’ve carried for 25 years.