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Posted: 4/2/2012 4:23:52 PM EDT
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Is it possible for a inertia/kinetic bullet puller to set of the primer and cause a KB?
I read on another forum that a guy was pulling bullets with his Lyman Inertia puller and the round went off. Possible, or more internet BS?? |
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I don't see how it's possible. There just isn't any way you could swing it hard enough to set off the primer. That would require a massive amount of acceleration which would probably destroy the rest of the case before it caused the primer to go off. There's just not enough mass in the primer, it doesn't have enough intertia. That's why it works for a bullet - the bullet has a lot of mass = more inertia. The case stops suddenly while the bullet keeps moving.
I'm guessing the guy either made the story up, or he had something inside the puller that contacted the primer. |
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Until a few months ago, I would have said, BS. But a regular here documented a round igniting from just falling from his progressive reloader. So, I would say unlikely, but possible? My question would be, 'how could the primer ignite?' All inertia pullers have nothing near the primer to strike them. Could the mass of the primer compound itself drive itself against the anvil hard enough to ignite? There would have to be some other external force involved here that we're not seeing.
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Quoted:
Until a few months ago, I would have said, BS. But a regular here documented a round igniting from just falling from his progressive reloader. So, I would say unlikely, but possible? My question would be, 'how could the primer ignite?' All inertia pullers have nothing near the primer to strike them. Could the mass of the primer compound itself drive itself against the anvil hard enough to ignite? There would have to be some other external force involved here that we're not seeing. got a link to that? I missed that one. |
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Quoted:
I remember the post outlining the KB in the inertia puller. I believe it was in regards to using a standard shell holder instead of the collet in the puller. I have been researching this since my original post. This ^^^ pops up over and over and seems to be the reason for the one and only KB. |
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Flamethrower made a post with pictures. He was loading on 1050 and set a drop tube to drop several feet into five gallon drop bucket. He posted pictures clearly showing case rim had made contact with primer.
Without contact to primer I find it hard to sell igntion could happen with Kinetic puller. |
| Don't know if this is the thread you are talking about or not but a guy on the grendel forum just had this happen to him luckily there was no powder in the case. primer goes off in kinetic puller |
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I ran into one guy that had a round detonate from dropping one round on top of another round, by sheer chance the rim hit the primer of another with enough force to cause it to go off. We have to remember that an uncontained round going off is dangerous, but not likely to cause major injury unless you are holding it in your hand at the time. A round detonating in a kinetic puller is extremely unlikely.  http://wingman26.com/images/shooting/reloading/ad2.jpghttp://wingman26.com/images/shooting/reloading/ad1.jpg  |
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Ignition due to contact with another cartridge is one thing, developing enough energy to ignite a primer under the inertia of its own weight would be remarkable. The first detail I would investigate is a primer pocket that is too loose to hold the primer, and is also too loose to load and shoot. Even then I am extremely skeptical.
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| noticed mythbusters mention and there was actually a scene in mythbusters before where adam was using a kinetic puller on rimfire cartridges. Then he read the directions that they are not intended for rimfire cartridges. He did not experience any kb but, I think that may be one very remotely possible way to accomplish a kb in a puller. |
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Quoted:
I ran into one guy that had a round detonate from dropping one round on top of another round, by sheer chance the rim hit the primer of another with enough force to cause it to go off. We have to remember that an uncontained round going off is dangerous, but not likely to cause major injury unless you are holding it in your hand at the time. A round detonating in a kinetic puller is extremely unlikely. http://wingman26.com/images/shooting/reloading/ad2.jpg http://wingman26.com/images/shooting/reloading/ad2.jpg
http://wingman26.com/images/shooting/reloading/ad1.jpg Either that round was thrown into the pile with some impressive force, or those are some extraordinarily soft primer cups. |
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Quoted:
I ran into one guy that had a round detonate from dropping one round on top of another round, by sheer chance the rim hit the primer of another with enough force to cause it to go off. We have to remember that an uncontained round going off is dangerous, but not likely to cause major injury unless you are holding it in your hand at the time. A round detonating in a kinetic puller is extremely unlikely. http://wingman26.com/images/shooting/reloading/ad2.jpg http://wingman26.com/images/shooting/reloading/ad2.jpg
http://wingman26.com/images/shooting/reloading/ad1.jpg Wouldn't the explosion blow the primer out of the casing? |
| I can *possibly* see an ignition if you are pulling from berdan-primed brass. Boxer primers, the anvil will move with the cup where is berdan, the anvil is independant of the primer cup. I can see a hard enough swing pushing the berdan primer hard enough into the case anvile and setting it off. |
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Quoted:
Quoted:
I remember the post outlining the KB in the inertia puller. I believe it was in regards to using a standard shell holder instead of the collet in the puller. I have been researching this since my original post. This ^^^ pops up over and over and seems to be the reason for the one and only KB. That's what I'm thinking. If a bullet is off center in the shell holder, the primer could come in contact the "floor" of the shell holder. |
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Quoted:
Possible, or more internet BS?? Used as intended, it is not possible. There is nothing in, on or near the primer. The primer cup is held very firmly in place by friction and is supported around its rim by the base of the primer pocket. It cannot accelerate to pinch the primer compound against the anvil. It is possible to screw up anything. The primer is fully exposed and could be struck from behind while the cartridge is in the puller. |
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