I think you need to keep one in the pipe, because if the situation's bad enough for you to clear leather, it's life or death - or it is that way with me - and the weapon needs to be able to function. 25/100th of a second needed to cycle the slide (provided you have your second hand free to work the slide) may be all you have between answering questions to a LEO investigator and being a statistic in the AG annual report.
My Dad who is 54yo had 2 people try to rob him 7 days apart, one with a gun, and one with a knife. The poker game was first. Door locked. A guy apparently waiting outside came in as someone left pulled a gun and demanded money. The dealer pulled out his .38 snubbie and fired 2 shots. Missed, but I bet the guy SHP. A week later dad was getting luggage out at a hotel with his girl. In an (unzipped) overnight bag he had his ruger mark II. A guy with a steak knife rushed him and as he went for his gun he had to stop and grab the guy's arm to keep from getting stabbed. He dropped his bag and his gun fell out.The guy picked it up and ran (thank GOD!). Instead of being stabbed he was only cut on his arm. He approached me about techniques and guns. 2 days after that he got himself a .38 snubbie, and carries daily.
I cannot for the life of me understand why someone would carry a P220 with the hammer back and no safety. Back when I went from the cocked and lock Colt 1911 to a Double action S&W model 39 I believed some of the stuff that I read about the bad qualities of the DA auto and I took a new hammer drop link and modified it so that it would not drop the hammer when putting the safety on. This gave me a cocked and locked S&W Model 39-2. But I did not like the way the gun worked on the range. I found that carrying a DA auto as it was designed a much better approach. Cock the hammer with the trigger weather it is a Glock Sig or S&W. If you have a problem with the long double action trigger pull. Either PRACTICE or go back to the 1911 design. With the traditional DA my practice is mostly 2 shot bursts from leather DA/SA. IE drop hammer reholster draw fire 2 shots drop hammer reholster draw and fire 2 etc.