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Old 04-29-2003, 01:09 PM
Padeye Padeye is offline
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Join Date: Nov 1999
Location: Phoenix, AZ, US
Posts: 7,672
Plugging a barrel can make a gun blow up. This has been known to happen with rifles and shotguns when careless hunters allow mud to plug the end. Even a bit of rainwater in a shotgun barrel is enough to cause a barrel bulge when the shock wave hits the uncompressable water. P.O. Ackley IIRC tested the Japanese Arisaka rifle (WWII bolt action rifle) by leaving a cleaning rod in the barrel. Amazingly the gun didn't blow up in the expected way but the force tore the threads off the barrel, launching it like a projectile.

That said it's really hard for an adult to get a finger in a gun barrel save for shotguns. If you have very small fingers you might get a pinkie inside a .45 caliber barrel but that's marginal.