So, not experiencing this in my 45 guns. I even had a few 45 kimbers running reliably with 200gr swc at 145 pf. Just frustrated because it would be nice to have a 9mm option. Seems like the gun is barely on the edge of running. So I'll toss all the variables at the experts. What are my goals? Reliable feeding, reliable slidelock, etc. I have a Trojan that just came back from STI to try and clear up infrequent nozedive jams. Aside from that issue, gun was good. My reloads are a 135gr coated at 1000 fps at 1.125". I'm sure that coated bullets at low PF are THE contributing factor...that FMJ and more power would help. Current recoil spring is a 10# conventional, measures 9.5# on the tester. Current mainspring is 17#. STI gunsmith Ricky was a pleasure to talk with. He fit a new barrel. Seems some of the earlier guns had steeper ramps and were cut too far from the magazine. I don't doubt that it ran fine on their range. They also sent me a Tripp mag and suggested I switch from my ETMs, which I have. It now takes a tap on the back of the slide 1/10 shots. Better than a nozedive jam but not cool. I also lost reliable slidelock. Both issues point to short stroking of the gun. Experts, what would your approach be? Reloads: I am experimenting at 1.15 oal. That's a frustrating move because I'll have to load shorter for other guns, even though those only represent a small volume of shooting. I've also gone up a tenth of powder, to try and get slidelock back, and perhaps tolerate a stiffer recoil spring. Springs: It seems like I need more spring for feeding, but that would hurt slidelock even more. Should I go down even further on mainspring to try and get some slide velocity? I've never had light strikes on Remington primers. Extractor: STI says they reset my extractor. I had it set light to help feeding. Perhaps it's now too tight to feed smoothly? Technique: Keep my thumbs off the slide. Other: I have an EGW raised mag catch on hand. Perhaps that would help with the feeding aspect? The trip mags have some clearance to the ejector. Other, other: Buy a higher end gun? End rant. Thanks for reading/responding.