I received my two new recoil springs in the mail a few days ago. I ordered a 15lb and 20lb spring from Wolff, thinking almost certainly the .40 S&W has enough punch behind it to properly cycle the handgun with the 20lb spring. I was able to hit the range on Friday, and no such luck. I had multiple malfunctions with the 20lb spring. Three in 30 rounds fired, which to me is unacceptable. All the malfunctions were the same, the front of the bullet nose dived into the feed ramp causing a failure to feed.
|Left to Right: Stock Spring, 15lb Spring & 20lb Spring|