OK, here's the deal. I have a Glock 27 and I got an aftermarket .357 SIG barrel for it. The gun goes bang and the bullet goes downrange, but I'm getting MANY failures to eject. Almost every other shot does this. The extractor is gripping the rim alright, and when I cycle the slide by hand it works just fine. It just seems that the cartridge dosen't have enough "oomph" to kick the slide back all the way for proper cycling. Yes, I am using handloads. I started on the low end of the power scale and worked up my loads from there. The last load I tested was just a hair below the max charge listed in my books and I'm still having the same problem. What I'm thinking is that the stock recoil spring for the G27 (.40 cal) is just too heavy for the .357 SIG and I need to go with a lighter one. Is this a fair assumption? Maybe a spring from a G26?