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Star BM failure to extract

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BigMau
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Star BM failure to extract

#1 Post by BigMau » Tue Aug 07, 2018 10:47 am

Just purchased a Star BM pistol from a local gun shop. This pistol is a great shooter and very accurate. I have noticed a firing a few mags of my 120 gr LRN (from my lee mold), I will have a failure to extract. The fired case is 1/2 out the chamber causing the pistol to jam. I cleaned the extractor assembly and gave the extractor spring a slight stretch. This seemed to solve the problem for awhile... then it returned. I'm kinda thinking I need a new spring??? Any advise? I'm also trying to find someone that stocks Star pistol parts.

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Ozzman
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Re: Star BM failure to extract

#2 Post by Ozzman » Tue Aug 07, 2018 6:53 pm

What powder charge and type are you using in your reloads?
What is the definition of PROCRASTINATION?
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pcj
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Re: Star BM failure to extract

#3 Post by pcj » Tue Aug 07, 2018 7:36 pm

There are a few possibilities.Dirty or rough chamber , extractor hook isn't positive and extractor may need to be fitted . Negative extractor hook or worn extractor can cam away from case when fired . Magazine could be sitting to high so the next round can hit the fired case . If you can try a different magazine .
Take off the slide place a round in place under the extractor , you should be able to wave the slide and the case should be held firmly against the breech face. If not extractor needs to be fitted to the gun or you may need a new extractor ,some new extractors need to be fitted too , many new parts aren't a drop in fit . Extractors fit is covered in gunsmith training​ and is hard to explain in a short post .
Have you tried different brands of ammo ? Some brands of ammo have different rim thickness and the extractor may work better with a certain brand .

If Numrich doesn't have parts you could try Jack First Inc . in Rapid City SD.
Just a few things to look for . Hope you get it figured out.If you do let us know what you found out .
Jack First phone​ # 605 343 8481
Last edited by pcj on Tue Aug 07, 2018 8:09 pm, edited 1 time in total.

BigMau
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Re: Star BM failure to extract

#4 Post by BigMau » Tue Aug 07, 2018 8:09 pm

I try to reload all my LRN bullets at or a tad less than 900 fps. most of the reloads shot from this pistol were loaded with 3.9 gr. of Bullseye. My reloads work fine in my Walther p-38 (AC-42), Walther Creed, Taurus Pt-99AR & PT-709 and Springfield XD-9 Service pistol

Before working on cleaning the extractor, I checked all spent brass cases. When I took the pistol apart, I tested the extractor to see if I would hold round. The cases did not show any signs of wear/marks from the barrel/chamber. However, I did notice that the extractor groove had some dirt and dried oily material in and around the extractor spring. So.. I soaked and scrubbed the area with Ballistol and used an old toothbrush to clean the area. The extractor spring seemed slightly compressed. So... after cleaning.. I stretched it out just a little. Worked great for a 100 or so of my reloads... then it stated again.
I ordered a new extractor spring... hope this is the problem

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Re: Star BM failure to extract

#5 Post by Ozzman » Wed Aug 08, 2018 4:10 pm

BigMau wrote:
Tue Aug 07, 2018 8:09 pm
I try to reload all my LRN bullets at or a tad less than 900 fps. most of the reloads shot from this pistol were loaded with 3.9 gr. of Bullseye. My reloads work fine in my Walther p-38 (AC-42), Walther Creed, Taurus Pt-99AR & PT-709 and Springfield XD-9 Service pistol
Before you do any further tinkering to the pistol or replace any parts, I recommend you try a full power FMJ 124gr 9mm load, or reload a few LRN's that push 1,100 fps (not to exceed 1,200 fps). Typically, 3.9 grains of Bullseye is the starting load for a 124 grain LRN bullet.. For Bullseye, I typically use 4.2 grains of powder from a 90465 lee mold that drops 124 grain bullets that I powder coat. A 120 grain LRN over 3.9 gr of Bullseye, producing 900fps may be too weak for the Star. Heck even a standard 115 gr FMJ load pushes 1190 fps.

Not trying to ruffle any feathers, but the Star BM is not a Walther p-38 (AC-42), Walther Creed, Taurus Pt-99AR & PT-709 and Springfield XD-9. This pistol was designed to use full power 9mm Luger (NATO) rounds. Check your pressure, are you at or near 27,000 psi?
What is the definition of PROCRASTINATION?
"I'll tell you tomorrow"

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RWS
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Re: Star BM failure to extract

#6 Post by RWS » Thu Aug 09, 2018 6:22 am

I agree with Ozzman. Try some factory ammo first. If it won't run with either 115 or 124 grain factory ammo then you have a genuine problem, but that's where you need to start your diagnosis, IMHO. On the other hand, trying a new extractor spring can't hurt and should be cheap & easy.

For what it's worth, I have one Star 9mm pistol that only functions with steel-cased Russian ammo, but I think it's the exception rather than the rule. Tula is $7.50 a box at my WalMart so it might be worth trying a box of it while you're at it.

-Bob

BigMau
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Re: Star BM failure to extract

#7 Post by BigMau » Fri Aug 10, 2018 9:20 pm

RWS & Ozzman...

My reloads are just for target practice and my not have enough kick for the Star pistol. I'll have to try some Tula and another factory load. Thanks for the advise!!

BigMau
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Re: Star BM failure to extract

#8 Post by BigMau » Sat Aug 11, 2018 4:23 pm

Well... Went to my local gun shop and purchased two boxes of Winchester 115 gr. FMJ loaded to NATO specs (plain brown cardboard box) anf took this pistol to the range. The ejection improved.. brass cases kept ejected and landed a few feet to my right. The pistol would only feed one or two rounds at a time? The rounds would jam between the magazine follower and barrel. Kinda looked the magazine spring did not have enough force to align and force the round into the proper position for feeding into the chamber??

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