Having an issue with my first 1911 (Used Springfield loaded ss). On the last round regardless of mag or brand/type of ammo, it jams the brass into the top of the slide but it still ejects (not good but it does eject the case). It did this with 9 out of 12 mags shot and one stove pipe. This is my first 1911 but the first thing I though of was recoil spring, then maybe extractor? I’ve read a bit about extractor tension and ejector angle but I was hoping these cases might be a common issue…
What does the ejector look like?
I can’t remember if the ejector in the Loaded model is extended or not but take a look at the face of it where it strikes the brass and see if there is anything missing. With it being the last round then I am thinking that this is the culprit due to another round not pushing on the brass when it feeds.
I would also check the recoil spring to see if it was replaced with one that is too heavy.
I am going to guess insufficient extractor tension.
Whne you have rounds in the mag, they are helping with ejection.
With all the Springfields I have worked on this is usually one of the first signs of the extractor failing. You will usually start to find brass that has been slammed in the ejection port and is grossly deformed. The next thing you generally see is the last round being pulled back and jammed in between the feed lips on the magazine.
You are starting to see this on the last round because it is not being supported by the next round in the magazine. The rest of your empties are being helped along by the top of the next round. Next time you are at the range try this. Load a round into the chamber and remove the magazine. When the extractor is really bad the empty will fall down the magazine well and not eject at all.
If you have a local gunsmith have him/her fit a new extractor. I have had very good luck with the Wilson Bullet Proof extractors. They seem much beefier than the factory Springfield part.
I tried that with an empty mag and it still ejected the case but strait up and barely out of the slide. I think I’ll order a new spring and extractor…
Good plan on the new extractor. On the several Springfield 1911s that I’ve owned the extractor was the weak link. Like mikem I’ve had excellent results with Wilson extractors in a number of 1911pistols by SA, Colt, & DW. 
WB
Excellent analysis and recommendations from mikem and others.
This is usually an extractor problem, that can be made worse if the ejector is loose and is likely to happen regardless of the ejector length or spring rate. A new extractor is likely in order, it needs to be fitted.
I ordered a Wilson bullet proof extractor, wolff recoil spring (16#) and a Colt mag. I’ll use this is my base line and work from there. What’s the proper way to fit the extractor?
Try your new Wilson extractor first before fiddling with it. If it needs adjusting, Wilson extractors come with instructions. Good luck. :)WB
Put the Wilson bullet proof extractor in and a 16# recoil spring and had to do some very slight fitting of the extractor. This 1911 runs GREAT now! For my first 1911 I’m very happy with it, thanks for the help guys!