ChemistShooter Posted March 13, 2017 Share Posted March 13, 2017 The slide on my 9mm XDM 3.8 Full-size started failing to lock back a couple of months ago. I replaced the guide rod spring (the big spring under the barrel) with another guide assembly from Springfield but that had zero effect. Instead it just kept getting worse. Today it started jamming. The slide won't go back far enough for the brass to eject. You can only shoot one round at a time. Weirdly enough, it will successfully eject if there is one round in the gun and lock back about half the time. I have about 12,000 rounds through the gun. I clean it every time I shoot it. I have replaced the striker spring and striker safety spring but that was general maintenance. I don't see how that could be causing this problem. Yeah, something is worn out and needs to be replaced, but I have no idea what. It's going into the shop but those guys never explain exactly what went wrong (plus taking eight weeks to get the gun back), and I imagine this is something simple for the experienced gun owners around here. I'd just like to have some idea what's wrong. Link to comment Share on other sites More sharing options...
Sarge Posted March 13, 2017 Share Posted March 13, 2017 Does it do it with full power defense ammo? Regular factory ammo? Or just reloads? Sure sounds like it's just not getting enough energy to the slide Link to comment Share on other sites More sharing options...
Loves2Shoot Posted March 13, 2017 Share Posted March 13, 2017 Time for new magazine springs, The follower presses up the release when it is out of bullets. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted March 13, 2017 Share Posted March 13, 2017 Most likely causes: your ammo is somehow way too light (how far are the cases thrown?) or its magazine spring time. Link to comment Share on other sites More sharing options...
ChemistShooter Posted March 13, 2017 Author Share Posted March 13, 2017 Haven't tested it with factory ammo. It shot thousands of rounds of my current load before developing this problem. And it's been gradually getting worse. I would expect a load problem to show up immediately. The brass get kicked out 4-6 feet. Magazine springs. Ok, now that's a real possibility. I have several magazines but have always been using the same magazine. I'll give it a shot with a different magazine. Link to comment Share on other sites More sharing options...
ChemistShooter Posted March 13, 2017 Author Share Posted March 13, 2017 35 minutes ago, Loves2Shoot said: Time for new magazine springs, The follower presses up the release when it is out of bullets. Ah. Learn something new every day. Thanks for enlightening me. Link to comment Share on other sites More sharing options...
Demp223 Posted October 20, 2018 Share Posted October 20, 2018 Pull your mag springs out and give a them a little stretch for a temporary fix. You should have 3-4 coils easily exposed and 5 on longer capacity mags before trying to put baseplate back on. Also 4-6 feet ejection is pretty soft load. 8-10 closer to normal. Link to comment Share on other sites More sharing options...
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