After doing some research on which after market barrel to get for my G20SF I decided on the Lone Wolf 6.02". For the time being I plan on using the stock recoil spring, but I'd appreciate hearing from those of you who have used this barrel with the stock spring (any malfunctions?) so I know whether or not I need to go ahead and order a different spring. My intentions are to shoot about 500-1k rounds using the stock spring so I get some use out of it before I replace it with a 22lb ISMI spring along with the lone wolf SS guide rod. Any advice is appreciated. Wanna kill these ads? We can help!