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Old May 4, 2013, 10:01 PM   #1
Old 454
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cartridge pressure

I had a little disagreement with my son, lol as to what revolver cartridge produces the highest pressure. Now I am not going divulge what cartridges we discussed, I told him I will post the question here and let the most knowlageble people here let him know what you all think.

So what is the most power full cartridge revolver cartridge out there pressure wise.
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Old May 4, 2013, 10:15 PM   #2
Cheapshooter
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This should help resolve any difference of opinion..
THE SPORTING ARMS AND AMMUNITION MANUFACTURERS' INSTITUTE sets the industry standards for firearms ammunition chamber pressure.

http://www.lasc.us/SAAMIMaxPressure.htm
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Old May 4, 2013, 10:17 PM   #3
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Pressure isn't really the same thing as power. I'll answer the pressure question, but without addressing which cartridge is the most powerful.

Right now, to my knowledge, no handgun round runs at a higher pressure than the .460S&W Magnum @ 65Kpsi.

2nd in line is the 500S&W Magnum at 60Kpsi.

As I recall, the .454 Casull, as originally loaded when it was a wildcat, ran 65Kpsi. If I'm not mistaken, it has since been downgraded to 50Kpsi. If it still runs at 65Kpsi, then that ties it with the .460Magnum for top pressure in a handgun round.
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Old May 5, 2013, 12:33 AM   #4
Newton24b
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well the problem is, you need to define handgun round. not every cartridge currently loaded into a handgun started out as a cartridge made for a handgun.

single shots come in many many flavors from 22lr to .500 Nitro Express
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Old May 5, 2013, 12:44 AM   #5
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As John pointed out, the latest 'super magnum' revolver cartridges are really hot numbers. They run serious pressures, comparable to rifle cartridges (or beyond).

But, even .327 Federal Magnum, with it's "low" 45k psi, is considered to be a very high pressure revolver cartridge. (Just for comparison, even .44 Mag is considered 'high pressure' at 36k psi.)
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Old May 5, 2013, 09:09 AM   #6
g.willikers
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Are you referring to factory ammo, or some of the reloads a friend of mine makes?
(A guy who should never be reloading, and definitely not someone whose ammo you'd want to borrow).
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Old May 5, 2013, 11:18 AM   #7
buck460XVR
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Quote:
originally posted by Newton24b:


well the problem is, you need to define handgun round. not every cartridge currently loaded into a handgun started out as a cartridge made for a handgun.

single shots come in many many flavors from 22lr to .500 Nitro Express
I believe the OP stated the discussion was about revolver ammo. In that case I believe JohnKSa is correct.

Quote:
originally posted by Old 454:


So what is the most power full cartridge revolver cartridge out there pressure wise.
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Old May 5, 2013, 12:36 PM   #8
newfrontier45
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Industry standard for the .454 is 65,000psi, although most factory loads are 50-55,000psi.
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Old May 5, 2013, 12:45 PM   #9
JohnKSa
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Great, thanks for the information. That means that the .454 Casull and the .460S&W Magnum are tied for 1st place for highest pressure in a handgun round.
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Old May 5, 2013, 12:50 PM   #10
Brian Pfleuger
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65k psi puts them at or very near a tie for the highest pressure of ANY hand-held firearm. There may be one, but I'm not aware of any rifle cartridges certified over 65k. Several are AT 65k, but few if any are over.
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Old May 5, 2013, 03:40 PM   #11
newfrontier45
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The .500S&W runs a close third at 60,000psi. Fortunately, many are finally getting the memo that velocity is overrated in a big bore revolver. That standard weight cast bullets do a better job than lightweight jacketed bullets at warp speed and do so without breaking your wrists or making your ears bleed.
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Old May 5, 2013, 07:36 PM   #12
Old 454
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thanks guys, this settled the question.
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