Ruger blow up?

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jthyttin said:
Ever heard of (sub)machine guns firing from open bolt?
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No comparison to your dreamt up scenario.

jthyttin said:
Not saying that extractor is as "efficient design" as firing pin, but many rimfire firing pins are not that "efficient" in the first place (i.e. they're blunt and seem to hit everywhere else than where they should).
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Who are you quoting?

Most extractors are efficient at err extracting. Most firing pins are supposed to be blunt.
Firing pin strikes are controlled via the hole they operate through, they don't move around.
I don't know what firearms you are using but I highly recommend you have them inspection by a reputable gunsmith asap!
 
In my experience extractor claws on rimfires are either coiled spring or mauser action driven and designed to “give” in order to clear and then lock on the cartridge rim - as Smelly says there is no way they would have sufficient energy to “launch” a rimfire….
🦊🦊
 
Foxyboy43 said:
In my experience extractor claws on rimfires are either coiled spring or mauser action driven and designed to “give” in order to clear and then lock on the cartridge rim - as Smelly says there is no way they would have sufficient energy to “launch” a rimfire….
🦊🦊
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👍 plus if the extractor was able to fire a rimfire we would know about it by now the .22lr was invented in 1887 just think how many millions and millions of rounds have been fired over the years.

Not sure how this gun locks up but the savage bmag 17wsm has the bolt lugs on the rear of the bolt, strange action cock on opening rather than the usual cock on closing. The 17wsm never really got any traction as the hmr won out.
 
dunwater said:
That rifle was a rimfire, not the centre fire M77.
Bits blowing off a firearm are never good, regardless of what’s to blame.
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On reflection you are right.
The gasses should of popped the mag down yes but not burst the mag well out to the side applying force to the stock as it did.
 
Smellydog said:
On reflection you are right.
The gasses should of popped the mag down yes but not burst the mag well out to the side applying force to the stock as it did.
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Hmmm.
I have seen two .17 hmrs which let go with similar damage either side of the mag well….
🦊🦊
 
1870-71 adopted US, Russia and Germany more modern centerfire cartridges which better can contain pressure.
 
2 things
1. I recall the launch of the .17 WSM being delayed because it "kept blowing up guns" (from someone from Anschutz USA at a long-ago IWA show) - and you can take that for whatever such 24-carat hearsay may be worth.
2. Earlier this year I had an out-of-battery discharge with a .22 WMR semi auto. The probable cause was the case hanging up on its way into the chamber and being struck on the rim by the extractor as the bolt was propelled forward by the recoil spring. The extractor was blown out, and the magazine disassembled itself, but the rifle was otherwise unharmed. The energy release was nevertheless surprisingly intense. It therefore seems excessive to claim that rimfire cartridges can never be set off by a rifle's extractor, though I would agree it is very unlikely to happen.
Regardless, for a gun to fail as catastrophically and dangerously as that Ruger so far into the production life of both the rifle and cartridge suggests that one or the other wasn't made properly.
 
Actually only damage to the Ruger in the video was blown exctractor (the guy didn't understand which part it was, IIRC he said maybe from magazine) and the left side of stock ripped right out. The gun cycled and dryfired in the end of video. Of course the mag was busted.

If the magwell had been enclosed from the side the stock would probably not have broken. Or maybe if the magazine was "more loose" or stock more durable.

I've been present when brass gave up on L1A1. In addition to crud flying here and there, only thing destroyed was the mag. But it was quite complete, the rest of the rounds inside the mag exited as a stack through the bottom, and the magazine body also flared in the places where it was not supported by magwell. The body stayed in the gun, though.
 
“Actually only damage to the Ruger in the video was blown exctractor”.
Yeah and if his hand had been nearby he could still have played the piano - with his other hand….
🦊🦊
 
Out of battery discharge in rimfire autos can also be caused via short stroke of the breech block and or from poorly adjusted trigger mechanism.
The common mistake of fitting lighter trigger spring parts to circumnavigate adjusting sears can lead to the hammer not engaging and following the bolt back into battery.
Nearly all blow back designs associated with rimfire auto's display bolt bounce, clearly observed in slow motion videos.

If the hammer follows the bolt after failing to engage the trigger it can result in the case head not being supported during an unscheduled discharge.
 
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