Help - FTRB

[rhtwist]

Hello and help,
I just received my 1911 back from the factory repair department. Since its return Friday I've oiled it and fired 100 WWB and 50 Federal HST in it. I am getting numerous failures to return to battery. Since I was using a lot of different mags Colts, Wilson's, flat with dimple, round with dimple, round I didn't take the time to identify a mag problem. The problems varied from what appeared to be a three point jam, down to cartridge three quarters of the way in an slide stopped from firing and stopped. Never seems to fail from a sling shot feed. Cleaned the chamber and tried some more and it seemed to help for a while.
Took the pistol home and did a complete cleaning thorough. I use Hoppes #9, then CLP and a little Wilson's Ultimalube. Cycles empty fine.
Managed to reproduce a fault 100% of the time. If I sling shot a round into the chamber and it goes into battery, under the ejector and then do a press check, pushing the slide back just far enough to see if there is a cartridge in the chamber, the slide locks in place. Takes more than a gentle push to get the slide to go back into battery. The extractor holds the rounds tight with no jiggling if it is pushed against the breechface. If pulled away from the breechface it still stay in but does jiggle. The slide stop shaft does not appear to go anywhere near the radius on the barrel underlugs until full lock. I know they replaced the recoil spring with a new factory one.
I don't know if firing it will loosen it up as I have no clue as to the problem.
Any ideas , opinons, knowledgeable opinion appreciated.
rhtwist

 

[log man]

Due to your explanation of it sticking on a press check 100% of the time I would be led to believe the extractor tension may be too high.

LOG

 

[rhtwist]

Hello log man,
Could you please explain to an unitiate, how you thought of that conclusion and how it works to cause the problem. I hope it is just that, but don't understand the scenario. Thanks for the response, BTW
rhtwist

 

[log man]

Sure when you press check, the barrel is pulled down out of slide engagement and this pulls the cartridge down in the extractor and must slip back up to return.

LOG

 

[rcmodel]

It can be a very sharp bottom edge on the extractor hook digging into the case rim. The case gets hung up trying to slide back under the hook.

Take it out and slightly break the sharp edges with a needle file and polish it, and I think you may fix the problem.

rc

 

[rhtwist]

Thank you Log Man and rcmodel. I see what you mean. Will investigate. Thanks for the help.
rhtwist

 

[rhtwist]

Update. I am very slowly polishing the extractor and have noticed an marked decrease in FTRB. Still getting the occassional press check slide jam. And 3 out of 100 WWB in the chamber but about half way out and require slight push to go into battery. Will continue the adventure. Wish me luck.
rhtwist

 

[rcmodel]

Take a black Magic-Marker and color a few case rims. Try chambering them and look for bottom extractor edge scratching the black off down to cutting into the brass.

rc

 

[rhtwist]

Good Idear,
Noticed I have more problem with nickle plated cases. Used up 250 rounds and no way to replace, so I'm looking for a expediting method. Take it easy.
rhtwist