Ammoguide cartridge challenge!
- Thread starter jsalcedo
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Hang fire...
I had the right answer, but am confused re the text:
Inquiring minds want to know.
-Andy
I had the right answer, but am confused re the text:
Now, how do you handle this - wait 10 or more seconds and hope when you clear that the situation doesn't go squirrelly?? Assuming there is a burn of sorts, where does (did) all that pressure go if the barrel's jammed and the bolt is locked?
Inquiring minds want to know.
-Andy
>Now, how do you handle this - wait 10 or more seconds and hope when you clear that the situation doesn't go squirrelly?? Assuming there is a burn of sorts, where does (did) all that pressure go if the barrel's jammed and the bolt is locked?
Really good questions.
My experience comes from squib loads in revolvers where the cylinder gap obviously vents pressure whether the bullet makes it out or not. (Except in the Nagant gas-seal revolver
But we can probably make a safe assumption that if the bullet didn't make it down the barrel, there was insufficient pressure to push it. The next thing we can probably assume is that the low pressure condition must be seriously low, not just a little bit low. I say this because in a general sense, bullets are pushed through barrels with considerably less pressure than what a high-power bolt action rifle generates (50,000 - 65,000 psi) - some handguns are in the range of 5,000 psi or so.
Ok, but your question is still valid - assuming some kind of low pressure failure causes the bullet to be pushed part way down the barrel and stop. Depending on the velocity attained, the bullet will have built up some inertia (or kinetic energy) that will want to carry it farther down the bore than the propellent expansion alone would carry it. This will tend to lower the pressure below the point when expansion stopped.
So... the point is, it wouldn't seem you could logically have too much pressure in this situation. In fact, if the case doesn't expand sufficiently to seal in the chamber, what little pressure is generated would vent there. Sometimes in low pressure situations, the primer is forced rearward (because it isn't expanded against the primer cup walls). and gas can leak through that point.
But... if it doesn't leak, and remains contained in the chamber, it probably still isn't that dangerous. Any significant pressure will lock the bolt lugs tight - you won't be able to open the bolt manually. If you can open the bolt, there probably isn't enough pressure to speak of.
Anyway, those are my thoughjt on your excellent scenario.
Mike Haas
http://AmmoGuide.com/
Really good questions.
My experience comes from squib loads in revolvers where the cylinder gap obviously vents pressure whether the bullet makes it out or not. (Except in the Nagant gas-seal revolver
But we can probably make a safe assumption that if the bullet didn't make it down the barrel, there was insufficient pressure to push it. The next thing we can probably assume is that the low pressure condition must be seriously low, not just a little bit low. I say this because in a general sense, bullets are pushed through barrels with considerably less pressure than what a high-power bolt action rifle generates (50,000 - 65,000 psi) - some handguns are in the range of 5,000 psi or so.
Ok, but your question is still valid - assuming some kind of low pressure failure causes the bullet to be pushed part way down the barrel and stop. Depending on the velocity attained, the bullet will have built up some inertia (or kinetic energy) that will want to carry it farther down the bore than the propellent expansion alone would carry it. This will tend to lower the pressure below the point when expansion stopped.
So... the point is, it wouldn't seem you could logically have too much pressure in this situation. In fact, if the case doesn't expand sufficiently to seal in the chamber, what little pressure is generated would vent there. Sometimes in low pressure situations, the primer is forced rearward (because it isn't expanded against the primer cup walls). and gas can leak through that point.
But... if it doesn't leak, and remains contained in the chamber, it probably still isn't that dangerous. Any significant pressure will lock the bolt lugs tight - you won't be able to open the bolt manually. If you can open the bolt, there probably isn't enough pressure to speak of.
Anyway, those are my thoughjt on your excellent scenario.
Mike Haas
http://AmmoGuide.com/
only1asterisk
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Mike,
More questions! I need to redeem myself after my poor showing on the last set. Maybe less tricky but more difficult?
David
More questions! I need to redeem myself after my poor showing on the last set. Maybe less tricky but more difficult?
David
Glad you like the Challenge! (and hope you like the website redesign too - feedback very appreciated)
You bet we'll add more questions, hope to put out a set every 2-4 weeks (but probably won't be able to next until after the NRA convention Apr 15-18).
Sorry you have to wait to regain the top slot, but patience... think of Carlos Hathcock...
Mike Haas
http://AmmoGuide.com/
You bet we'll add more questions, hope to put out a set every 2-4 weeks (but probably won't be able to next until after the NRA convention Apr 15-18).
Sorry you have to wait to regain the top slot, but patience... think of Carlos Hathcock...
Mike Haas
http://AmmoGuide.com/
As far as the Weatherby questions, I plead guilty. But it's your fault for being so smart - I have to pull out the "big guns".
Mike Haas
http://AmmoGuide.com/
Mike Haas
http://AmmoGuide.com/
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