I ordered a spring kit from Wolff. It came with a recoil, firing pin, extractor and extra strength magazine spring. The old magazine spring was smaller then the new one in every dimention and filt kind of wimpy. The old recoil spring was a little shorter then the new one and was smaller in diameter at one end to grab the guide rod. I replaced them both along with the extractor spring for good measure. I took the pistol to the range, along with the old recoil spring. The first several shots out of the magazine functioned fine, but then the 4th had the high angle jam. I then put the old recoil spring in and it functioned perfectly for 4 magazines including one of Speer Gold Dots. So the combination of the stronger mag. spring and the weaker recoil spring worked. Thanks for all of your suggestions