MIGUEL
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Posts posted by MIGUEL
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Just now, MIGUEL said:
the shuemann informe.
Problem number 5: Because of Problems 1, 2, 3, and 4 Type 416 Stainless is not a good material for sub-gun barrels
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15 hours ago, jschroep said:
Can we get a working link to the report again? I'm not seeing what material is used on the SVI barrels on the website. Also in the original post it was stated that the material used to manufacture the barrels is 416R, That's the material that was recommended in the article that posted from schuemann. So was the original post wrong in saying that the barrel was made with 416R and it is actually made with 416?
I really think it is irresponsible as a reloader to not consider that there could be quality issues with the ammo.
It was also previously stated that bullet setback is not an issue with 38 super ( or was it 38 supercomp?) I have a hard time reconciling that in my engineering mind pressure should increase if volume decreases? IE the bullet is setback further in the case.
the shuemann informe.
Problem number 5: Because of Problems 1, 2, 3, and 4 Type 416 Stainless is not a good material for sub-gun barrels
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Just now, HIREDgun45 said:
I didn't mention anything about a double charge. I'm simply asking if your position is that there is no possibility that the ammo you used (during the life of the gun) caused a catastrophic failure.
definitely not, two weapons of different brands were fired in parallel, if ammunition is a problem it should affect the other weapon too,
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7 hours ago, MIGUEL said:
the barrel broke, in the practice of unsheathing and precision to a plate at 25 meters, this was not a squib , I have it in my possession barrels, I will take many photos and share them with you,
take some photos with a nikon d 7000, but they are not very clear I must get a good lens for close photos, it will take a longer time.
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1 hour ago, HIREDgun45 said:
The google drive file wasn't working for me either so I can't view the contents.
So do you reject any possibility that this damage was due to user error and that the damage was caused by improperly reloaded ammo?
no place for a double charge in the brass
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44 minutes ago, MILDOTS said:
When I started shooting my first gun was a 45 commander with a comp .Apparentley the last round of the match was a squib. After lunch I had my wife shoot at a new target, one shot two holes on a clean target. The barsto Barrel was split from the chamber to the comp, both sides. Thankfully the slide wasn’t damaged. Unfortunately my wife decided she didn’t want to start shooting with me. It was was squib in my opinion.
There is an internal mark on the stretch marks, product of the squib in your pistol?
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6 minutes ago, Jim Watson said:
This thread is eerily similar to what I was reading earlier about the "low number" 1903 Springfield.
Weak metal
Bad ammo
Bad luck
Only a few
"Mine's fine."
Too bad the OP is far foreign and can't walk in and lay his barrel on Mr Strayer's desk.
I couldn't bring up the link to the lab report.
The first thing to keep in mind is that SVI from the beginning rejected any possibility that the material was defective, without even seeing the barrel, hence my doubt and sent to analyze the material. It is for this reason that I request the quality certificates of the other 6 pistols.
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9 hours ago, Ming the Merciless said:
Do you remember if there was a visible indication in the barrel of where the squib bullet was?
the barrel broke, in the practice of unsheathing and precision to a plate at 25 meters, this was not a squib , I have it in my possession barrels, I will take many photos and share them with you,
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20 minutes ago, HIREDgun45 said:
So have you sent the barrel and slide back as requested by Sandy Strayer/SV?
I will not send it until Sandy answers the email that is a few post above
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Just now, ltdmstr said:
I did. And I agree there are plenty of people who feel 416 stainless isn't a good choice for rifle/pistol barrels. But that doesn't change the fact that it's widely used in the industry for that exact purpose. Please go back and reread my prior post, then tell my what part is incorrect.
I cannot deny or assure if it is used a lot or a little, the calculation memory of the 416r for production pistols, the lowest factor the utilization factor is .29 resists three times the pressure, but for pistols the highest value factor is 1.02 factor of service, the material does not structurally resist open pistol pressure. I think SVI knows this perfectly because on its website it offers barrels of sae 4340 material, several times superior in quality compared to the aisi 416R,
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30 minutes ago, arkadi said:
As for the odds... The conclusion assumes uniform distribution.
Yet, if the barrels are made in sequence - and serial numbers suggests that's the case - they could be made from same barstock piece. People make errors, SVI is not spotless. The piece could be defective - beyond SVI control, until they test in-house. That's very unfortunate as some other people might be affected too. Even if the probability of that is like 1%, that's in my opinion, is totally reckless to ignore and deny (on manufacturer side). One high-profile case of missing fingers and the brand is gone?
Somehow a lot of drama here is around blown-up barrel.
Totally ignoring a separate occurrence with broken lower lug for which the photo is posted here.
Happy IMM owner otherwise.
My main concern is with my remaining pistols, my fingers and my face, there is no quality certificate and no pressure test, SVI does not show what pressure their barrels work, nor what pressure the barrels test since pressure breaks, It is very comfortable for them to say it is only a double burden and it is the responsibility of the athlete, but they do not display anything that certifies that it is a good product. I had to send them to examine the material to demonstrate that their barrels are not of good quality.
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45 minutes ago, 3GN said:
I have exactly same rupture on my gun .... bullet stay stack in barrel and next one do same rupture like Miguel pictured
Sent from my iPhone using TapatalkWhen that happens that you mention in the grooves of the barrels, there is a clogging mark. in this case he was practicing sesenfunde to a plate at 25 meters. all the shots went well even the one that explored the barrel the lead also hit the metal blaco
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1 hour ago, ltdmstr said:
I'm not here to defend the manufacturer, and I'm not a fan boy. I'm just stating a fact that the odds (from a statistical point) are WAY low for one person to experience two such failures out of the universe of SV pistols built with 416R barrrels. Again, not impossible, but darn close. As for the barrel being defective, that's a possibility. But the analysis you provided isn't definitive, and doesn't take into consideration the history of the barrel and how it was used, and various other factors. It does indicate there were cracks early on that lead to the ultimate failure. But again, that doesn't prove the material was defective vs. the being subjected to excessive pressure, perhaps on many occasions, or some other factor. And you're statement that 416R stainless is inappropriate for the application is incorrect. It's widely used in the industry, and failures across that spectrum are quite rare. It may not be the best material to use, but it's an accepted industry standard. I'm not saying either party is at fault, only that we can't know for sure from the information that's been provided so far.
You read this pliss
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32 minutes ago, RangerTrace said:
That certainly appears to be a double charge of powder and most, if not all barrels, would do that.
I would like to know why there are many people who say that it seems that it is a double burden, but none assures it, much less mentions that there is evidence that this was really happened, the university report clearly says that the breakup did not occur Once, physically, no double charge enters the brass.
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On 3/29/2020 at 9:18 PM, 3GN said:
I cant understand how case help you? I have similar rupture on my tanfoglio 8-10 years ago
8 hours ago, ltdmstr said:Considering this manufacturer has built thousands of guns with similar barrel material, and from those, experienced a very, very small number of failures (probably a fraction of one percent), the odds of one person experiencing two such failures is probably close to zero, absent something unique to that person. I'm not saying it's impossible, but pretty darn close.
I always talk about the real thing, not what I believe or think, here in Chile in the last 3 years 12 SVI pistols have entered, today there are 4 broken barrels, all people have been denied a guarantee, the percentage is 25 %, the reason they say is always the same, our pistols are made of the best materials. if you enter their website they say that their barrels are made of sae 4340, and my reality is that they added aisi 416. therefore to say that they always use the same material (defective aisi 416r), it would be to ensure that SVI deliberately misleads people offering one quality on their website and delivering another. on the other hand there is evidence that the aisi 416r does not work for barrels used in IPSC or USPSA.I hope I can have the peace of mind that SVI in my other 6 pistols that are not yet used put a good material, copy the emails above, but that still does not happen I have been waiting for technical certificates for several months to review and I still have no news
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Just now, MIGUEL said:
estoy esperando esta respuesta que al dia de hoy aun no llega.
Dear SVI:
As we talk on mail before,
You have in your possession a barrel of SVI CPOZOW 1 caliber .40 (attached photos). This broken Barrels has the same imperfection pattern as the broken barrel of the SVI gun would be MM 31683 cal .38 super.
The broken Barrel of the CPOZOW 1 pistol, YOU replaced it with cost to the customer. The answer from SVI is that cannon was “the best quality”, the same response I received when asking about the quality of the SVI gun barrel MM 31683. Which I have shown is not so.
As SVI insists in the quality of its guns. I ask you to send me the Fat (Factory acceptance test) which indicates working pressure, test pressure and rupture pressure, and also attach the certificate of quality of the material used by the construction of the barrels.
for the following guns:
- SVI Serial Number, SAVANT 34, .40 caliber
- SVI Serial Number, MM 31682, 9 mm caliber
- SVI GM Series Number 610931, 9 mm caliber,
- SVI GM serial number 610932, caliber .38 SUPERCOMP
- SVI Serial number MM 31684 caliber .38 SUPERCOMP
- SVI Serial number MM 31685 caliber .38 SUPERCOMP
As there is already a report that checks defects in their barrels, All the guns mentioned in the list have BEEN REMOVED and will not be “USED”, until I receive the test certificates issued by you. Once the certificates have been received, the test values will be verified and compare by national laboratories, we will make sure that nobody gets hurt with.
Best regards,
Miguel Mondaca.
De: strayer@sviguns.com [mailto:strayer@sviguns.com]
Enviado el: domingo, 26 de enero de 2020 10:44
Para: mmondaca.mv@do-sp.cl; Miguel__Mondaca@vtr.net; clementewagnerc@gmail.com; Casey Hamrick; Brandon Strayer
Asunto: ReportMiguel,
Thank you for the metallurgical report in English!
Sorry that it has taken a few weeks to respond to your email, but it is important to us that we take the time to thoroughly review the report and findings.
Communication is often difficult across great distances and between languages and we applaud your efforts to maintain open exchanges.
Truly appreciate your diligence in working with us to correctly ascertain the cause of the barrel failure.
There may have been a translation issue on the Sulphur content of the material.
416R is manufactured to include a maximum amount of Sulphur of 0.15% and is thus called a riffling (R) grade manufactured for the express use in pistol or rifle barrel manufacture.
The standard grade of 416 has a Sulphur minimum content of 0.15% and maximum content of 0.40% .
Please verify this information with the University staff.
We will be in contact with the steel mill and its metallurgical staff soon but suspect they will require the parts for evaluation.
Please send us the barrel and slide at your earliest convenience.
Thanks again for all your diligence and help in the evaluation of the barrel failure!
Please feel free to contact us at any time!
Warmest Regards,Sandy Strayer
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24 minutes ago, bret said:
he is trying to blame it on the barrel, that isn't what cause it, it was ammo related.
apart from your opinion what tests do you have to ensure what you say?
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29 minutes ago, bret said:
where is the picture of the ruptured case?
of bronze?
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19 minutes ago, bret said:
where are the pictures of it with the brass that blew up?
Looks like an over charge or a squib then another round behind it.
the photos are at the beginning
What evidence do you observe to believe that it is a squeb
What evidence do you observe to believe that there is a lead behind another? -
56 minutes ago, shred said:
It looks like an overstressed steel fracture that was not caught in the early stages of the crack formation. That's what the lab report says. Too much pressure, not strong enough steel, small crack at first then grows explosively.
The argument is likely going to be around how much pressure was applied and for how long and what caused the initial crack.
looking I found this
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13 hours ago, racegun9 said:
"Finally, it is considered that the inclusions of MnS axially aligned with the barrel along with the stress
level, facilitated the nucleation and propagation of cracks consistent with the observed longitudinal frac-
ture."Pretty much what I was thinking.
Take a good look at that fracture
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14 hours ago, schaet said:
Put of curiosity has Infinity seen this report? I just bought 2 barrels from them (9 and 38). I'm wondering what they say?
If they have the original in January and rev 1 in March 5, I think you should ask for the quality certificate of the material with which it was made and the FAT tests (factoring acceptance test) they have the obligation to certify the quality of all the products they sell, only their word is useless
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40 minutes ago, yigal said:
very pro .report.
i saw few failures on 1911 barrels made from same type of steel SS 416 with standard factory 9 mm ammo. pf 140
in a minor factor that material probably works well
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On 1/30/2020 at 2:31 PM, GrumpyOne said:On 2/16/2020 at 2:34 PM, Posvar said:
Any more updates or info on this?
Dear Friends
The rupture of the barrel of the SVI MM31683 gun was due to the fact that SVI manufactured the barrel with a different material than the SAE 4340 that it publishes on its website, this gun was broken because they used a defective AISI 416r. I send you the links of the study of material in English and Spanishhttps://drive.google.com/open?id=1woyQT8y9Wqv9gbG-h2sti_S5JxkpU6JZ
https://drive.google.com/open?id=1YIMezMSPb14aCXrI20rG2yP1YqCmXOV2
SVI BROKEN BARREL
in Open Pistols
Posted
https://drive.google.com/open?id=1XJdFuxRq5VAnBqKzBqTmHTuFrvPurIn1