Well I got the spring from STI. It's thicker and about 3/16" longer than the original spring, but I still think it's too short. Definitely noticed an improvement. The slide will always close completely when empty now. Took it to the range. Still about 1 out of every 20 rounds doesn't want to fully chamber. Huge improvement but not good enough. The slide with travel the remaining 1/8" easily if I push it with my thumb.
Also had 2 rounds FTE. My reloads won't shoot at all. They will not chamber. Case must be expanded too much. I'll have to play around some and see.