Primers & Pressure

1inthechamber · January 9, 2006, 05:12 PM

Just out of curiousity, how many pounds of pressure does it take for the primer to ignite?

WESHOOT2 · January 10, 2006, 06:05 AM

Primers can "ignite" from static.

WARNING: PRIMERS WILL EXPLODE

jclaude · January 11, 2006, 12:59 PM

PHP Code:


			
Just out of curiousity, how many pounds of pressure does it take for the primer to ignite?

Don't really understand the question. Could you, maybe, rephrase it?

Avizpls · January 11, 2006, 01:13 PM

he means:

What kind of inpact force from the firing pin is required before the primer will 'go off'

**Mal H** · January 11, 2006, 01:33 PM

It's not totally a question of pounds (force), a primer requires a certain speed of impact as well, and I don't know exactly how fast that speed needs to be.

To illustrate, if you slowly push a firing pin shaped object into a primer in a normally primed case, it will not go off, the primer pellet will crush and the pin will eventually pierce the primer cup. In reality, you have exerted considerably more force on the primer than a hammer/firing pin does. Yet with the speed of the hammer coming into play the primer will go off.

So the bottom line answer to the original question is - it depends.

Avizpls · January 11, 2006, 01:51 PM

but an impact force, or as I previously said: inpact, does involve speed to. I know what you mean. Its also considerably harder to set of a primer with a sharp Ice Pick than with a 1.5mm rounded pin punch

**Mal H** · January 11, 2006, 02:19 PM

Exactly - my reply was directed at the original poster, not you, even though it immediately followed your reply. 'Impact' is the correct word to use. But the speed required in the impact is a variable and is an unknown to me.

Avizpls · January 11, 2006, 02:40 PM

Sorry.

Im going to see if this is somethig that I can use my resources of scientific equipment to actualy quantify a number....

We'll see.

1inthechamber · January 11, 2006, 06:17 PM

Thanks guys for the replies. Avizpls rephrased it better, so thanks Avizpls.

It just popped into my head when I was looking over spent casings and unfired cartridges and wondered how much force or speed it took for the primer to go off.

Thanks again.

Avizpls · January 12, 2006, 12:07 AM

Sorry to tease. I wont be able to do this

January 9, 2006, 05:12 PM	#1
1inthechamber Senior Member Join Date: November 18, 2005 Posts: 299	Primers & Pressure Just out of curiousity, how many pounds of pressure does it take for the primer to ignite?

January 10, 2006, 06:05 AM	#2
WESHOOT2 Senior Member Join Date: February 20, 1999 Location: home on the range; Vermont (Caspian country) Posts: 14,324	not many Primers can "ignite" from static. WARNING: PRIMERS WILL EXPLODE __________________ . "all my ammo is mostly retired factory ammo"

January 11, 2006, 12:59 PM	#3
jclaude Senior Member Join Date: January 3, 2006 Location: Coastal North Carolina Posts: 157	Pounds of pressure to ignite primer? PHP Code: `Just out of curiousity, how many pounds of pressure does it take for the primer to ignite?` Don't really understand the question. Could you, maybe, rephrase it?

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January 11, 2006, 01:13 PM	#4
Avizpls Senior Member Join Date: November 9, 2004 Posts: 774	he means: What kind of inpact force from the firing pin is required before the primer will 'go off'

January 11, 2006, 01:33 PM	#5
Mal H Staff Join Date: March 20, 1999 Location: Somewhere in the woods of Northern Virginia Posts: 16,947	It's not totally a question of pounds (force), a primer requires a certain speed of impact as well, and I don't know exactly how fast that speed needs to be. To illustrate, if you slowly push a firing pin shaped object into a primer in a normally primed case, it will not go off, the primer pellet will crush and the pin will eventually pierce the primer cup. In reality, you have exerted considerably more force on the primer than a hammer/firing pin does. Yet with the speed of the hammer coming into play the primer will go off. So the bottom line answer to the original question is - it depends.

January 11, 2006, 01:51 PM	#6
Avizpls Senior Member Join Date: November 9, 2004 Posts: 774	but an impact force, or as I previously said: inpact, does involve speed to. I know what you mean. Its also considerably harder to set of a primer with a sharp Ice Pick than with a 1.5mm rounded pin punch

January 11, 2006, 02:19 PM	#7
Mal H Staff Join Date: March 20, 1999 Location: Somewhere in the woods of Northern Virginia Posts: 16,947	Exactly - my reply was directed at the original poster, not you, even though it immediately followed your reply. 'Impact' is the correct word to use. But the speed required in the impact is a variable and is an unknown to me.

January 11, 2006, 02:40 PM	#8
Avizpls Senior Member Join Date: November 9, 2004 Posts: 774	Sorry. Im going to see if this is somethig that I can use my resources of scientific equipment to actualy quantify a number.... We'll see.

January 11, 2006, 06:17 PM	#9
1inthechamber Senior Member Join Date: November 18, 2005 Posts: 299	Thanks guys for the replies. Avizpls rephrased it better, so thanks Avizpls. It just popped into my head when I was looking over spent casings and unfired cartridges and wondered how much force or speed it took for the primer to go off. Thanks again.

January 12, 2006, 12:07 AM	#10
Avizpls Senior Member Join Date: November 9, 2004 Posts: 774	Sorry to tease. I wont be able to do this