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Joined: Jul 2001
Posts: 60,143 Likes: 10
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,143 Likes: 10 |
Apparently several people posting on this thread have never consulted primer manufacturers about all the possible variations in results--yet they're very sure of their partial "knowledge." But that's pretty much the Campfire these days....
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Joined: Apr 2005
Posts: 30,937 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
Posts: 30,937 Likes: 1 |
[quote=Llama_Bob]More pressure causes more velocity. The bullet literally is a pressure gauge. Not exactly, use a powder with too fast of burn rate and you can be way over pressure and under velocity. That's irrelevant as we're talking about holding the powder constant. If you change BOTH the primer and the powder, then you can get radical changes in pressure without a change in velocity. Of course you could get that by just changing the powder and ignoring the primer too. No it is not irrelevant
I got banned on another web site for a debate that happened on this site. That's a first
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Joined: Sep 2016
Posts: 1,313
Campfire Regular
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Campfire Regular
Joined: Sep 2016
Posts: 1,313 |
[quote=Llama_Bob]More pressure causes more velocity. The bullet literally is a pressure gauge. Not exactly, use a powder with too fast of burn rate and you can be way over pressure and under velocity. That's irrelevant as we're talking about holding the powder constant. If you change BOTH the primer and the powder, then you can get radical changes in pressure without a change in velocity. Of course you could get that by just changing the powder and ignoring the primer too. No it is not irrelevant I love how when you're caught being stupid you just reflexively flap your gums. It really suits you. The fact is that the primer contributes very little of the overally peak pressure produced by a shot. The VAST majority of the gas comes from the powder, and the powder burn rate is effectively independent of the primer, although it is possible with too low brissance a primer to get a slightly slow ignition or in some odd cases maybe even a failure to ignite or hangfire. If the former happens, both pressure and velocity will drop together like physics says they have to.
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Joined: Jun 2002
Posts: 596
Campfire Regular
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Campfire Regular
Joined: Jun 2002
Posts: 596 |
... the powder burn rate is effectively independent of the primer... That's nearly true of the individual kernels, but the pressure made by the cartridge is a function of how many of those kernels light up at first and how readily the bullet gets out of the way. Powder "burn rate" does not determine peak pressure by itself. .
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Joined: Apr 2005
Posts: 30,937 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
Posts: 30,937 Likes: 1 |
[quote=Llama_Bob]More pressure causes more velocity. The bullet literally is a pressure gauge. Not exactly, use a powder with too fast of burn rate and you can be way over pressure and under velocity. That's irrelevant as we're talking about holding the powder constant. If you change BOTH the primer and the powder, then you can get radical changes in pressure without a change in velocity. Of course you could get that by just changing the powder and ignoring the primer too. No it is not irrelevant I love how when you're caught being stupid you just reflexively flap your gums. It really suits you. The fact is that the primer contributes very little of the overally peak pressure produced by a shot. The VAST majority of the gas comes from the powder, and the powder burn rate is effectively independent of the primer, although it is possible with too low brissance a primer to get a slightly slow ignition or in some odd cases maybe even a failure to ignite or hangfire. If the former happens, both pressure and velocity will drop together like physics says they have to. You are apparently an idiot
I got banned on another web site for a debate that happened on this site. That's a first
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Joined: Apr 2005
Posts: 30,937 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
Posts: 30,937 Likes: 1 |
... the powder burn rate is effectively independent of the primer... That's nearly true of the individual kernels, but the pressure made by the cartridge is a function of how many of those kernels light up at first and how readily the bullet gets out of the way. Powder "burn rate" does not determine peak pressure by itself. . He is full of more bull crap than a fruit cake. He isn't smart enough to know what he doesn't know
I got banned on another web site for a debate that happened on this site. That's a first
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Joined: Aug 2014
Posts: 5,025 Likes: 2
Campfire Tracker
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Campfire Tracker
Joined: Aug 2014
Posts: 5,025 Likes: 2 |
I wouldn't put a weak link in place 6" from my face with 50,000 + psi. Lyman49th has a section on primer substitution and primers make a difference in their research.
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Joined: Jan 2021
Posts: 473 Likes: 1
Campfire Member
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Campfire Member
Joined: Jan 2021
Posts: 473 Likes: 1 |
Apparently several people posting on this thread have never consulted primer manufacturers about all the possible variations in results--yet they're very sure of their partial "knowledge." But that's pretty much the Campfire these days.... Amen to that!
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