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Posted: 5/4/2026 3:09:02 PM EDT
| I remember reading about special low noise cartridges in revolvers that were used by some US soldiers for clearing tunnels in Viet Nam. The rationale was to avoid the deafening blast of firing a standard cartridge in the small confines of a tunnel. The cartridge had a sort of valve in it that prevented the gas from exiting the cartridge while at the same time pushing the bullet down the barrel. So there was no muzzle blast. I don't imagine that such a load would have much power. Does anyone here have any further information about this sort of load? |
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Originally Posted By osprey21: QSPR tunnel gun. Yes., that is it. Thanks for finding it and posting it. |
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Originally Posted By sandboxmedic: The Soviets had a revolver design too, theirs used a little different style captured piston design. Each cartridge considered a suppressor in itself, but now that we have $0 can stamps... |
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Originally Posted By sandboxmedic: The Soviets had a revolver design too, theirs used a little different style captured piston design. OTs-38 Stechkin Revolver & PSS Semi Auto pistol |
Now with more political fatigue.
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Originally Posted By Polarbear31: https://www.youtube.com/watch?v=rdT_WjkIPsM  Modern Captive Piston Ammo Could Enable Silent Handguns |
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The soviets did a lot more work with captured piston cartridges then we did. There are still some semiautomatic pistols with captured piston ammo floating around Russian police departments. After firing, the cartridge remains pressurized and can still be dangerous for a few days, until the pressure bleeds off. https://en.wikipedia.org/wiki/PSS_silent_pistol |
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Originally Posted By Teller_Ulam: The soviets did a lot more work with captured piston cartridges then we did. There are still some semiautomatic pistols with captured piston ammo floating around Russian police departments. After firing, the cartridge remains pressurized and can still be dangerous for a few days, until the pressure bleeds off. https://en.wikipedia.org/wiki/PSS_silent_pistol Did you find any information regarding if the fired cases can be reloaded? |
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Originally Posted By DonSaba: Did you find any information regarding if the fired cases can be reloaded? I did not. I suppose with the proper equipment they could be reloaded, but they are dangerous to handle once they've been fired. I sure would hate to cut into one. |
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Originally Posted By backbencher: Now that stamps are $0, this becomes a commercial possibility. Need a fairly rapid bleed off though. The fired cartridges must be fairly low pressure, since I assume they are ejected after firing from a semi auto pistol or a revolver and I assume that they do not blow up on ejection from the chamber. It would be interesting to see what kind of seal was used in these cartridges. |
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Originally Posted By DonSaba: The fired cartridges must be fairly low pressure, since I assume they are ejected after firing from a semi auto pistol or a revolver and I assume that they do not blow up on ejection from the chamber. It would be interesting to see what kind of seal was used in these cartridges. Originally Posted By DonSaba: Originally Posted By backbencher: Now that stamps are $0, this becomes a commercial possibility. Need a fairly rapid bleed off though. The fired cartridges must be fairly low pressure, since I assume they are ejected after firing from a semi auto pistol or a revolver and I assume that they do not blow up on ejection from the chamber. It would be interesting to see what kind of seal was used in these cartridges. No, they're gonna be like 50,000 PSI immediately after firing. They ARE the chamber. You could have a 3-D printed cylinder and they'd work. |
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Originally Posted By osprey21: QSPR tunnel gun. |