Rob1928 Posted March 22, 2023 Report Share Posted March 22, 2023 After many years and many 10s of thousands of rounds I finally got a squib followed by a barrel rupture (3 hairline cracks in the bulge). This was at the 6 o'clock position just under the tip of the horizontal fore end. This was with S&B 230 grain FMJ ammo, which I've shot several cases of in the last few years as it was available. I have a new blued finned barrel with a full auto chamber in my spare parts box. The gun was refinished to like new by PK about 12-13 years back so ideally I'd love to find someone who can give it a dulite finish to match the rest of the gun, but I'll take anyone who knows what they're doing or who is willing to rent the tools. Thanks for any and all suggestions! I'll try to post a picture when I get a chance to transfer one from my phone. Rob Link to comment Share on other sites More sharing options...
Gio Posted March 22, 2023 Report Share Posted March 22, 2023 Have you contacted P K he may be able to do it . He still does work just not taking any new rebuilds. Frank Link to comment Share on other sites More sharing options...
TSMGguy Posted March 22, 2023 Report Share Posted March 22, 2023 2 hours ago, Gio said: Have you contacted P K he may be able to do it . He still does work just not taking any new rebuilds. Frank Right. PK has done some great work on jobs for me that don't involve full rebuilds. Fast turnaround, and that fine PK sense of humor! Link to comment Share on other sites More sharing options...
Deavis Posted March 27, 2023 Report Share Posted March 27, 2023 I was on the wait list for a WH turned PK awesome and he wrote me last year advising he would be unable to get to me. Link to comment Share on other sites More sharing options...
Rudy Posted March 27, 2023 Report Share Posted March 27, 2023 John andrewski in New Hampshire. Does a great job. Usually a fast turn around 1 Link to comment Share on other sites More sharing options...
bradhe Posted March 27, 2023 Report Share Posted March 27, 2023 How did rupture happen? Did the squib have enough power to work the bolt and cycle the next round in or did you recock and fire? I have on my todo list running a series of tests to see if it is possible to have enough force to cycle the action without the bullet exiting the barrel Link to comment Share on other sites More sharing options...
SP Sarge Posted March 27, 2023 Report Share Posted March 27, 2023 Rob what was the lot number and manufacturer date on the S& B ammo? (if you still have the box) I have 1200 rounds of S&B sitting downstairs. Link to comment Share on other sites More sharing options...
TSMGguy Posted March 28, 2023 Report Share Posted March 28, 2023 23 hours ago, bradhe said: How did rupture happen? Did the squib have enough power to work the bolt and cycle the next round in or did you recock and fire? I have on my to-do list running a series of tests to see if it is possible to have enough force to cycle the action without the bullet exiting the barrel I remember debates about this very question. The consensus was that a squib round would have very little or no powder in it. The shooter would see what looked like a failure to eject the fired case. If the barrel was not checked for an obstruction, then the next full-power round bulged or ruptured the barrel. So, it's essentially not possible to damage a barrel without some action on the part of the shooter. I'm aware of the possibility of this happening, though I have yet to see it personally. If someone else is firing one of my guns, I'm standing right there, hopefully ready to intervene if necessary. The same goes for hang fires and failures to fire. These, I have seen. Count to 30 and eject the cartridge, leaving it on the ground for later disposal. Don't immediately pick it up for inspection. Some surplus ammo is notorious for hard primers, 1950s Yugo 8mm Mauser, for instance. 1 Link to comment Share on other sites More sharing options...
giantpanda4 Posted March 28, 2023 Report Share Posted March 28, 2023 16 hours ago, SP Sarge said: Rob what was the lot number and manufacturer date on the S& B ammo? (if you still have the box) I have 1200 rounds of S&B sitting downstairs. I too am very interested in the lot number if available! Link to comment Share on other sites More sharing options...
Bridgeport28A1 Posted March 28, 2023 Report Share Posted March 28, 2023 Me three on the lot number if available. What color were the boxes? Link to comment Share on other sites More sharing options...
Ryo Posted March 31, 2023 Report Share Posted March 31, 2023 Sad PK isn't taking any more business. I always hear Andrewski Link to comment Share on other sites More sharing options...
Rob1928 Posted April 3, 2023 Author Report Share Posted April 3, 2023 Number on the inside flap of the box is 147713. I didn't see any other lot info. Link to comment Share on other sites More sharing options...
Bridgeport28A1 Posted April 3, 2023 Report Share Posted April 3, 2023 7 minutes ago, Rob1928 said: Number on the inside flap of the box is 147713. I didn't see any other lot info. What color are the S&B boxes Lot 147713? Red and green or gold and black? Link to comment Share on other sites More sharing options...
Mike Hammer Posted April 3, 2023 Report Share Posted April 3, 2023 S&B .45 is pretty good ammo over all, and I have shot many, many rounds through several Thompson with it but.. On rare occasion when loading my mags or drums I have found a bad round where the the bullet is inserted way too low in the brass, a bad load. I would just say whenever loading your mags or drums, be sure to take a good look at each individual round to make sure that it looks kosher. Link to comment Share on other sites More sharing options...
Rob1928 Posted April 3, 2023 Author Report Share Posted April 3, 2023 Here's the crack. This sounds far fetched, but I'm not exactly positive what happened. Was shooting in an indoor tunnel that was well lit at each end, but went forward to the poorly lit 25 yard area with a few mags and folks. Nothing sounded unusual. After the gun cooled I put it away, and this was discovered the next time I took it out. From the top with the forend in place the bulge is barely noticable. I assume a squib lodged a bullet in the barrel, then the next bullet impacted it enough to dislodge both but did the damage shown in the process. I'm surprised they didn't simply pile up in there with the gas venting back out of the chamber. Link to comment Share on other sites More sharing options...
Rob1928 Posted April 3, 2023 Author Report Share Posted April 3, 2023 (edited) Black and gold ammo box. FWIW, years ago I had an OOB with a mac resulting in a stuck round. I didn't get off of the trigger quickly enough and the next round most definitely did not push the first one out! Edited April 3, 2023 by Rob1928 Link to comment Share on other sites More sharing options...
Mike Hammer Posted April 3, 2023 Report Share Posted April 3, 2023 Rob, that is pretty nasty looking, sorry this happened to you. As an actual Thompson shooter and not just a safe queen collector, these things can happen and I’m thankful it hasn’t happened to me, please let us know about the details of getting this barrel replaced when it happens. Link to comment Share on other sites More sharing options...
deerslayer Posted April 8, 2023 Report Share Posted April 8, 2023 I can swap your barrel for you if you need someone. Dan Link to comment Share on other sites More sharing options...
Got Uzi Posted April 8, 2023 Report Share Posted April 8, 2023 I just rebarreled my Colt NAVY yesterday. It’s not bad once you get it jigged and locked in place. Link to comment Share on other sites More sharing options...
RogerD Posted April 9, 2023 Report Share Posted April 9, 2023 Several months ago I purchased a case of 9mm direct from Norma. Opened the first box and had 2 squibs in the first 20 rounds. It appeared to be a malfunction. Ran my dowel rod down the barrel and found an obstruction. OK that gun is done for the day. Loaded the second gun, fired a few shots, another malfunction. Squib. That was it for the day. Inspecting the brass I immediately noticed it had a thick black soot on it. Notified Norma and they sent me a prepaid shipping label and refund. Link to comment Share on other sites More sharing options...
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