SVI BROKEN BARREL

[ltdmstr]

Whatever it was, it sure took a lot of pressure to do that much damage.  I've seen plenty of guns blown up from double charges, etc., but none had damage like that.

[EEH]

You going to contact SV about it. Please post results.

[sarpau]

On 1/29/2020 at 11:11 AM, MIGUEL said:

 

 

I'd say this confirms an ammo issue.

If you have enough over pressure to blow the contents of the magazine right through the base pad, I think you'd have enough pressure to crack the barrel/slide.

 

Not being too familiar with Longshot, can the case fit enough for a double charge?

 

[EEH]

Longshot will peak at certain velocity then adding more powder gives you nothing. I tried it and quit trying.

But I don’t think 7 gr should do that.

[barry]

The casing you want to look at is the one that split the barrel. If overloaded case head will be ironed flat with primer pocket being grossly oversize. If barrel was flawed case head will be relatively undamaged as pressure was normal. On a squib  there is always a bulge where bullet was lodged caused by air being compressed between stuck bullet and rapidly advancing bullet just fired. If barrel splits it will be at bulge not chamber as a squib  dosent raise chamber pressure unless stuck bullet is touching fired bullet. 

[GrumpyOne]

55 minutes ago, EEH said:

Longshot will peak at certain velocity then adding more powder gives you nothing. I tried it and quit trying.

But I don’t think 7 gr should do that.

I used to shoot 8.2 of Longshot in 38super with a MG 115JHP. The primers were getting a little flattened. Longshot is very loud.

[Whoops!]

1 hour ago, GrumpyOne said:

All but 2 of that brass is ok....but those two had some sort of overpressure issues. It could be bullet setback, it could be a larger than normal charge. The ones in question do not appear to be flattened, and if the others came from the same batch, I would expect them to show the same signs, if the cause was bullet setback, I would expect to see them all like that.

If the bullet setback is intermittent (definitely possible depending on the sizing die with .355 brass), I would expect the primers to look exactly like that in a random sample.

[TONY BARONE]

Start loading with an EGW U-Die for your own safety.

[shred]

Clearly some well-used brass there.  Even a Supercomp in with the Supers.  But you use what you can get and I don't think this is simple brass failure. 

 

I've seen barrel splits like this with rounds fired behind squibs albeit usually with less damage to the slide.

 

[3GN]

On 1/29/2020 at 8:11 AM, MIGUEL said:

Good afternoon friends,
Has this happened to anyone else with a gun? When? brand?.
The material used in the manufacture of this barrels is an AISI 416R.

In my country there are already several broken barrels of the same brand.

 

http://www.schuemann.com/Portals/0/Documentation/Webfile_Barrel_Steel.pdf

 

Greetings from Chile.
Miguel Mondaca

I have exactly same damage couple years ago with my Tanfoglio.

i have round stack in barrel and next Round made explosion . I’m 100% sure it’s about ammo...

BTW.. this is one of the best barrel on market ...probably #1

Edited January 31, 2020 by 3GN

[3GN]

This picture confirm u have same problem.

u have bullet stack in barrel ....

[Hi-Power Jack]

Two quick questions:

 

1.  do you use a light on your press and SEE the powder in Every case before you seat the bullet ?

 

2.  I'd be very interested in hearing more details about the other five people you know who

      have had the same problem.

 

Thanks, and good luck with it.  You are Very Lucky.     

[22 shooter]

I agree with 3GN, I think it was a bullet in the barrel. I don't think an overloaded case would have done that much damage.

[ltdmstr]

I'm not familiar with Longshot, but would be very surprised if you could double charge that case with another 7gr of powder and not have it spill over.

[Hperea]

I am curious to see if you decide to send it to SVI what would be the response.  

[Posvar]

If it is over 5 years old then they won’t even touch it unfortunately based on info in another thread. OP, when was it built?

[ltdmstr]

1 minute ago, Posvar said:

If it is over 5 years old then they won’t even touch it unfortunately based on info in another thread. OP, when was it built?

 

Doesn't really matter.  It's beyond repair, and clearly the failure wasn't caused by a manufacturer's defect.  Even if the barrel material were questionable, as OP suggests, there's no way you'd have that kind of damage without some type of massive pressure event.  Most likely a barrel obstruction.

[Descartian]

I’m glad to hear you still have all of your fingers any eyes after that. I’m pretty sure I’d $h!t my pants if that blew up in my hands. 

Edited February 1, 2020 by Descartian

[MIGUEL]

On 31/1/2020 at 18:17, ltdmstr said:

 

Realmente no importa. Está más allá de la reparación, y claramente la falla no fue causada por un defecto del fabricante. Incluso si el material del barril fuera cuestionable, como sugiere OP, no hay forma de que tenga ese tipo de daño sin algún tipo de evento de presión masiva. Lo más probable es una obstrucción de barril.

try to upload a pdf ,it is the report of the analysis of tha material barrelsand it is very heavy , tomorrowiwill ask for help from a specialist in compressin files.

in the brass no double load enters.

[MIGUEL]

On 31/1/2020 at 18:12, Posvar said:

Si tiene más de 5 años, ni siquiera lo tocarán desafortunadamente según la información en otro hilo. OP, ¿cuándo fue construido?

i buy six pistol and only used two , the two barrels is break , 1 standard pistol and 1 open pistols

[3GN]

8 hours ago, MIGUEL said:

i buy six pistol and only used two , the two barrels is break , 1 standard pistol and 1 open pistols

Send us picture of standard broken barrel please....

 

I be in fight with SV many times for some other reason (1 time I received gun which I order in wrong caliber, couple time guys go over promised delivery time couple months) but never ever have any issue with barrels. I use in all my guns SV barrel and never have any problems.

 U are very first owner of 2 SV guns with broken barrel.

better sell other 4 guns before u make some mess again.  

[MIGUEL]

5 hours ago, 3GN said:

Envíenos una imagen del barril roto estándar, por favor ...

 

He peleado con SV muchas veces por alguna otra razón (1 vez que recibí un arma que pedí con un calibre incorrecto, un par de veces los chicos superaron el tiempo de entrega prometido un par de meses) pero nunca tuve ningún problema con los barriles. Utilizo todas mis armas SV barril y nunca tengo ningún problema.

 U es el primer propietario de 2 pistolas SV con cañón roto.

Mejor vender otras 4 armas antes de volver a hacer un desastre.  

 

[Shmella]

If you have the option to buy factory ammo or ammo loaded by someone else locally who shoots ipsc id go that route. Have you ever had a squib that noticed in the past?

[MIGUEL]

Just now, Shmella said:

Si tiene la opción de comprar munición de fábrica o munición cargada por otra persona local que dispara ipsc id, vaya por esa ruta. ¿Alguna vez has tenido un squib que se haya notado en el pasado?

Here in Chile, all athletes recharge, and the only broken cannons are SVI, I use the same bullets, same tip, same powder in an open Akai gun and I have no problem.

[Whoops!]

Most squibs cause a higher localized pressure peak which tends to make extreme bulging in one area very obvious.

 

This still looks more like a detonation event to me given how spaced out the damage is.  The barrel couldn’t contain the pressure at its weakest point as opposed to wherever the squib would have forced the barrel to contain the pressure.  Intermittent lack of neck tension could have put a bullet in a very unusual proximity, causing just the unique condition necessary.  

 

Lines up with the primers and the barrel cross section more so than a squib in my experience, but I obviously can’t rule out anything with the information we have.

 

 

I also understand this barrel make it looks more like a squib because of the lighter area where the powder residue and finish appears to have been blown off just before the cracked opening.  However, I still don’t think squib is the most likely explanation.

Edited February 3, 2020 by Whoops!