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#4628793 - 01/08/18 10:41 PM Low pressure loads
JHZR2 Offline



Registered: 12/14/02
Posts: 41789
Loc: New Jersey
I have the opportunity to shoot a real, original M1917. I'd like to shoot as low pressure loads as possible. I don't reload so I'm looking for commercial product. Any recommendations on how to find/compare offerings in 45ACP?

Thanks!

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#4628812 - 01/08/18 11:13 PM Re: Low pressure loads [Re: JHZR2]
WhyMe Offline


Registered: 12/18/12
Posts: 513
Loc: Washington for now
Cowboy action uses real low power stuff. since its a revolver cycling is not and issue .

here is on place i googled

http://www.powderrivercartridge.com/45-acp-cowboy-action-s/69.htm

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#4628833 - 01/08/18 11:50 PM Re: Low pressure loads [Re: JHZR2]
Reddy45 Offline


Registered: 08/15/08
Posts: 2970
Loc: USA

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#4628878 - 01/09/18 03:43 AM Re: Low pressure loads [Re: JHZR2]
WyrTwister Offline


Registered: 01/13/13
Posts: 1531
Loc: Texas
This is a .45 LC ?

For me , this is no problem . I reload . Just have to be sure there is enough powder to propel the bullet out the barrel .

But , a question . In a full size revolver , .45 LC is pretty mild with loads that duplicate the original BP loads . Why do you wish to go slower than that ?

Also , I have a Lee mold for 200 grain RNFP bullets . I load that with 8 grains of Unique for a mild load . In both wheel gun and lever gun .
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#4628891 - 01/09/18 05:14 AM Re: Low pressure loads [Re: JHZR2]
Slick17601 Offline


Registered: 12/04/04
Posts: 1515
Loc: Pennsylvania
Trail Boss with a 185 or 200 grain lead bullet would be a good place to start. Hodgdon's have load data. Trail Boss burns pretty clean, too.

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#4628903 - 01/09/18 06:06 AM Re: Low pressure loads [Re: WyrTwister]
JHZR2 Offline



Registered: 12/14/02
Posts: 41789
Loc: New Jersey
Originally Posted By: WyrTwister
This is a .45 LC ?

For me , this is no problem . I reload . Just have to be sure there is enough powder to propel the bullet out the barrel .

But , a question . In a full size revolver , .45 LC is pretty mild with loads that duplicate the original BP loads . Why do you wish to go slower than that ?

Also , I have a Lee mold for 200 grain RNFP bullets . I load that with 8 grains of Unique for a mild load . In both wheel gun and lever gun .


No, this is an M1917 designed to fire 45ACP.

Why go slower? It's a 100 year old item that Imwant to be easy on.

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#4628904 - 01/09/18 06:07 AM Re: Low pressure loads [Re: JHZR2]
NateDN10 Offline


Registered: 01/10/10
Posts: 1735
Loc: Rochester, NY
Did you guys miss the part where he said .45 ACP and that he doesn't reload?
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#4628906 - 01/09/18 06:14 AM Re: Low pressure loads [Re: NateDN10]
Shannow Online   content


Registered: 12/12/02
Posts: 39875
Loc: 'Stralia
Originally Posted By: NateDN10
Did you guys miss the part where he said .45 ACP and that he doesn't reload?


Oh, well in that case an ILSAC 5W30.

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#4628908 - 01/09/18 06:14 AM Re: Low pressure loads [Re: Reddy45]
JHZR2 Offline



Registered: 12/14/02
Posts: 41789
Loc: New Jersey
Originally Posted By: Reddy45


Thanks! So, maybe I don't know what I'm talking about, but those seem to be reduced recoil, standard pressure. What ai think I'm interested in is reduced pressure. I don't have a penetration or expansion target for a bullet. Just get it out with spin so it can hit a target at 25 yards without keyholing.

I figure the less pressure (even if it equates to lower speed), the less strain on a 100 year old item.

I guess recoil is jarring on the frame, but it seems to me, perhaps incorrectly, that lower pressure will reduce stresses on the cylinder and barrel.

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#4628919 - 01/09/18 06:28 AM Re: Low pressure loads [Re: JHZR2]
Shannow Online   content


Registered: 12/12/02
Posts: 39875
Loc: 'Stralia
JHZR2,
I get you.

Velocity/Recoil are exchange of momentum. Pressure is the forces and times applied to the componentry to get there.

Can have a short high pressure event, or a long slow push, for different outcomes.

e.g.
http://www.adi-powders.com.au/handloaders/pdfs/130117_Handloaders_guide_6th_edition_WEB.pdf

check out the .45 ACP and the Copper Units of Pressure (historically the compression of a soft copper disk to measure chamber pressure).

Vast differences, that velocity and recoil can't describe backwards.

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#4628920 - 01/09/18 06:30 AM Re: Low pressure loads [Re: JHZR2]
Astro14 Offline


Registered: 10/10/10
Posts: 8539
Loc: Virginia Beach
A couple of thoughts:

First, both models (S&W and Colt) of these firearms are older, theyíre well made, and strong. Not like the Starr 1858 revolver that I got for Christmas...which I treasure, but will never fire. The M1917 might be an antique in our view, but itís a modern firearm in construction and materials.

Next, .45ACP is a fairly low pressure load to begin with.

Finally, very low pressure loads can actually increase strain on the gun, thatís why there is a minimum powder charge in all of the reloading manuals. Any commercial load will be above the minimum and below the maximum.

That said, because of your desire to minimize the strain on the gun, I would go with the Buffalo Bore - same pressure as the 230gr ball, but with a 185gr bullet, which will reduce the recoil impulse. Since you donít reload, thatís about the best you can do... But I wouldnít sweat shooting an M1917. Both the Colt and the S&W are well-made, and will be just fine with regular .45ACP for which they were designed and placed in military service.


Edited by Astro14 (01/09/18 06:31 AM)
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#4628921 - 01/09/18 06:34 AM Re: Low pressure loads [Re: Astro14]
Shannow Online   content


Registered: 12/12/02
Posts: 39875
Loc: 'Stralia
Originally Posted By: Astro14
Finally, very low pressure loads can actually increase strain on the gun, thatís why there is a minimum powder charge in all of the reloading manuals. Any commercial load will be above the minimum and below the maximum.


Astro, that's not "low pressure" per se, there's a phenomenon that when the charge density gets too low, particularly with double base powders, can cause a massive and catastrophic spike in pressure due to irregular combustion

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#4628924 - 01/09/18 06:39 AM Re: Low pressure loads [Re: Shannow]
Astro14 Offline


Registered: 10/10/10
Posts: 8539
Loc: Virginia Beach
Originally Posted By: Shannow
Originally Posted By: Astro14
Finally, very low pressure loads can actually increase strain on the gun, thatís why there is a minimum powder charge in all of the reloading manuals. Any commercial load will be above the minimum and below the maximum.


Astro, that's not "low pressure" per se, there's a phenomenon that when the charge density gets too low, particularly with double base powders, can cause a massive and catastrophic spike in pressure due to irregular combustion


Yeah, youíre right, good point - I didnít say that right...low-powder loads can actually be high pressure because the bullet doesnít accelerate down the barrel...

So, regular loads might be at, or near, the lowest point in the pressure curve for a given ammo?
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#4628974 - 01/09/18 08:12 AM Re: Low pressure loads [Re: Shannow]
KCJeep Offline


Registered: 06/30/11
Posts: 6999
Loc: Mahzurrah!
Originally Posted By: Shannow
Originally Posted By: NateDN10
Did you guys miss the part where he said .45 ACP and that he doesn't reload?


Oh, well in that case an ILSAC 5W30.


crackmeup

You might try some Freedom Munitions target loads. They are reasonably priced and in my experience their target stuff, particularly the reman loads, are pretty tame. A 230 gr ball from them will likely be clocking about 750 fps... mild for a 45 but should still be enough to function well.
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#4628989 - 01/09/18 08:31 AM Re: Low pressure loads [Re: JHZR2]
BrocLuno Offline


Registered: 09/06/15
Posts: 5519
Loc: Kalifornia Kollective
Yeah, sorry I don't get the low pressure thing. Sure I'd prolly stay away from "hot" loads in a worn gun. But if it's in decent mechanical shape, run what it was meant to run.

There is nothing wrong with the design or the steel used to make it. What's the concern?

If it's showing stress cracks and stuff, should not be shot at all. If it's in good shape, just shoot commercial loads and be happy smile
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