needknees Posted February 5, 2009 Share Posted February 5, 2009 (edited) I recently jumped headfirst into the singlestack world and ended up with two nice guns - A worked over Kimber in .40 and a STI Trojan in .45. The Kimber has been running wonderfully. The STI, however, has been giving me a headache trying to figure out what the heck it's doing. I've never really dealt with 1911s before this so bear with me. The STI is frequently extracting a case and slamming it back into the slide/top of the chamber. The slide is locked back when this happens, and only on the last round in the mag. I'm using Wilson 47ds and running fairly warm ammo - it chrono'd at 179PF. I'm not sure what recoil spring is in the gun at this point but have a feeling it's either 14 or 16lbs. I did buy the gun used, I'm don't know what the previous owner had in there. It happens on a number of different mags so I don't think that's the issue. I've tried it with the aformentioned Wilsons, 10rd CMCs, and 8rd MecGar mags all with the same result. The strange thing is it doesn't happen consistently - sometimes it'll run beautifully but other times it'll smash the hell of of brass every time you run it dry. And it's a bear to get out. What the heck would cause this and how do I fix it? Is something buggered up with the extractor or ejector? I'm not familiar enough with 1911s to spot something out of whack right off the bat, but nothing seems to be obviously wrong. I did a little test at the recommendation of another shooter and with the slide off, a case fits snugly between the breach and extractor -- rotating the slide around in all directions it held the case there. But when pushed from the side it fell out fairly easily. Any ideas? Edited February 5, 2009 by needknees Link to comment Share on other sites More sharing options...
HSMITH Posted February 5, 2009 Share Posted February 5, 2009 Does it have a buffer on the guide rod? Is the ejector broken? Link to comment Share on other sites More sharing options...
needknees Posted February 5, 2009 Author Share Posted February 5, 2009 Does it have a buffer on the guide rod? Is the ejector broken? I'm not running a shockbuff and the ejector looks fine to my untrained eye. I can take pics tonight. Link to comment Share on other sites More sharing options...
wide45 Posted February 5, 2009 Share Posted February 5, 2009 Erratic ejection on the last round usually means extractor. First make sure the tunnel in the slide is clean. You can try to bend it to increase the grip. Link to comment Share on other sites More sharing options...
Beretta Lover Posted February 6, 2009 Share Posted February 6, 2009 I bet Bob Lodrigan at Brazos custom gunworks can help diagonose this He is the contributing editor for gunsmithing for the USPSA magazine Frontsight Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now