After I had several double feeds may last time out at the range I ordered and recieved the heavy duty mag springs. Put them in and took my gun to the range today. I shot 60 rounds of Blazer 115 fmj gn. and 20 rds of Gold Dot 115 hp grn. No problems. Pulling back the slide to chamber a round with the new mag springs installed requires some grit, but it has made all the difference in making it 100% reliable. I set up about 15 ft from the target and did some quick double taps with the GD's. I was able to keep 11/12 rds in the torso of a B27E target. The one round went low into the right hip area. I was very pleased with it's handling. I know ::)I said I would only feed it premium food, but I figured if it fed proper on the Blazers, it would feed proper on the GD's. Hiccups cured........