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Rd blow up in the chamber
- Thread starter Peter Teh
- Start date
Need more data.
I've personally fired military surplus ammo that was 40+ years old. The NORMAL course with aging powder is for velocities and pressures to decrease a tiny bit over the years.
I can't yet tell what make the ammo was, from your ammo description--could you scan a sample headstamp and/or packaging label?
Bore obstructions can, but do not always, result in chamber-area failures. More frequently, they can lead to the case failing and squiring melted brass and very high-pressure and very hot gases through the action, causing great destruction and mild to serious injuries. I'm not familiar with any incidents of steel cases failing.
A barrel made of poor steel (either the wrong steel or badly head-treated steel) led to a spectacular failure of an M1A (civilian version, US M14 rifle) in 7.62mm/.308 Win. last January. Photos were posted on TFL, if I remember correctly. The problem there was that the barrel was structurally iron with isolated pockets of the harder steel in its physical structure. Over hundreds or thousands of rounds, tiny stress cracks in the bore gradually grew until too many of them joined together and the barrel split a few inches in front of the chamber, then continued to split back to the chamber, destroying the receiver in the process.
A rifle barrel exposed to a fire could be changed to the functional equivalent of iron, if I understand the heat damage process correctly. We would need a metals-educated person to comment on how high the temperatures would need to be, and how long of exposure, for that to happen. However, such a damaged barrel could fire many rounds before failing.
Please describe the blowup and the damage.
I've personally fired military surplus ammo that was 40+ years old. The NORMAL course with aging powder is for velocities and pressures to decrease a tiny bit over the years.
I can't yet tell what make the ammo was, from your ammo description--could you scan a sample headstamp and/or packaging label?
Bore obstructions can, but do not always, result in chamber-area failures. More frequently, they can lead to the case failing and squiring melted brass and very high-pressure and very hot gases through the action, causing great destruction and mild to serious injuries. I'm not familiar with any incidents of steel cases failing.
A barrel made of poor steel (either the wrong steel or badly head-treated steel) led to a spectacular failure of an M1A (civilian version, US M14 rifle) in 7.62mm/.308 Win. last January. Photos were posted on TFL, if I remember correctly. The problem there was that the barrel was structurally iron with isolated pockets of the harder steel in its physical structure. Over hundreds or thousands of rounds, tiny stress cracks in the bore gradually grew until too many of them joined together and the barrel split a few inches in front of the chamber, then continued to split back to the chamber, destroying the receiver in the process.
A rifle barrel exposed to a fire could be changed to the functional equivalent of iron, if I understand the heat damage process correctly. We would need a metals-educated person to comment on how high the temperatures would need to be, and how long of exposure, for that to happen. However, such a damaged barrel could fire many rounds before failing.
Please describe the blowup and the damage.