S&W 625 JM & +P rounds?

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Overloads are usually going to just bulge and crack stuff or batter the lockwork. A catastrophic failure like that is almost surely going to be due to a double charge of fast powder. Where pressures are much greater than any published heavy load.
 
CraigC said:
Overloads are usually going to just bulge and crack stuff or batter the lockwork. A catastrophic failure like that is almost surely going to be due to a double charge of fast powder. Where pressures are much greater than any published heavy load.
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CraigC, that's why I approach reloading my .45 Colt rounds with a great deal of trepidation. Those cases are so cavernous and the amount of powder that goes in occupies such a small volume, you could easily double charge and even with a quick visual inspection, it'd be almost impossible to tell.

One of the reasons I no long reload .45 Colt brass. I've switched over to Starline's .45 Cowboy Special brass ... exactly the same case length as the .45ACP's case. But in all honesty, it'd still be easy to miss a double charge even with that case.

BTW, I've also switched over to Ramshot's True Blue powder. It occupies more of that cavern. Even with the Starline Cowboy Special brass, there's plenty of space to add more powder.
 
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I'm just going to leave this here and see what happens. I'm kind of surprised it hasn't come up in this thread yet.

"There are two key elements to the .460 Rowland® concept. The first is a sharp increase in cartridge maximum pressure over the .45 ACP and .45 Super. Maximum Average Pressure is: 45 ACP (21,000 PSI), .45 ACP +P (23,000 PSI), .45 Super (28,000 PSI), .460 Rowland® (40,000 PSI)."

"The Ruger Blackhawk and Smith & Wesson Model 25/625 can also be chambered to fire the .460 Rowland®."

https://www.460rowland.com/about/

Clark .460 Conversions
DESCRIPTION PRICE
Convert .45 ACP Ruger® Blackhawk® to shoot .460 Rowland Ammo $100.00
Convert S&W® 25/625 (.45ACP) to shoot .460 Rowland Ammo $100.00

https://clarkcustomguns.com/gunsmithing-service/clark-460-conversions/

I wouldn't do it to my 625, but apparently some pretty knowledgeable people are comfortable with it.
 
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silicosys4 said:
I'm just going to leave this here and see what happens. I'm kind of surprised it hasn't come up in this thread yet.

"There are two key elements to the .460 Rowland® concept. The first is a sharp increase in cartridge maximum pressure over the .45 ACP and .45 Super. Maximum Average Pressure is: 45 ACP (21,000 PSI), .45 ACP +P (23,000 PSI), .45 Super (28,000 PSI), .460 Rowland® (40,000 PSI)."

"The Ruger Blackhawk and Smith & Wesson Model 25/625 can also be chambered to fire the .460 Rowland®."

https://www.460rowland.com/about/

Clark .460 Conversions
DESCRIPTION PRICE
Convert .45 ACP Ruger® Blackhawk® to shoot .460 Rowland Ammo $100.00
Convert S&W® 25/625 (.45ACP) to shoot .460 Rowland Ammo $100.00

https://clarkcustomguns.com/gunsmithing-service/clark-460-conversions/

I wouldn't do it to my 625, but apparently some pretty knowledgeable people are comfortable with it.
Click to expand...
.460 Rowland would be the upper echelon of what the n frame is capable of. As Craigc stated there is a reason the frame cannot handle higher pressures and they had to move up in size to the x frame.
 
No way would I convert a S&W to .460Rowland. That's 8000psi over "Ruger only" .45Colt loads.


jski said:
CraigC, that's why I approach reloading my .45 Colt rounds with a great deal of trepidation. Those cases are so cavernous and the amount of powder that goes in occupies such a small volume, you could easily double charge and even with a quick visual inspection, it'd be almost impossible to tell.
Click to expand...
I'd never do it with something like Bullseye or Titegroup but with Unique, you can definitely see a double charge. But you're right, the .45Special is probably the best cartridge for this application. The .45Colt is really a lot of wasted powder space.
 
This thread reminds me how much cross pollination we have between forums, both "tactical" and "traditional". I'm seeing similar posts from two other forums I frequent, lol.
 
Master Blaster said:
Should be fine. More pressure and velocity means slightly more wear on the gun and on your hand also. If you want a .44 magnum buy a gun in that caliber instead of hot-roding .45colt.
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There is no problem with hot rodding the .45Colt, as long as it's done in the right gun. A S&W is just not the right gun to exceed 23,000psi in.
 
earlthegoat2 said:
@jski

44 Mag case width at the rim is .457 and 45 ACP is .476. I would imagine the chamber diameters would follow those numbers as well so the 45 ACP is .016 larger diameter. So it would be reasonable to assume (uh oh) the walls are .019” thinner.
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Half that, based on diameter...actually, the wall would be thicker by half the dia difference. Right?
 
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