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Low pressure loads #4628793
01/08/18 11:41 PM
01/08/18 11:41 PM
Joined: Dec 2002
Posts: 42,087
New Jersey
JHZR2 Offline OP
JHZR2  Offline OP
Joined: Dec 2002
Posts: 42,087
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!

Re: Low pressure loads [Re: JHZR2] #4628812
01/09/18 12:13 AM
01/09/18 12:13 AM
Joined: Dec 2012
Posts: 605
Washington for now
WhyMe Offline
WhyMe  Offline
Joined: Dec 2012
Posts: 605
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

Re: Low pressure loads [Re: JHZR2] #4628833
01/09/18 12:50 AM
01/09/18 12:50 AM
Joined: Aug 2008
Posts: 3,166
USA
Reddy45 Online shocked
Reddy45  Online Shocked
Joined: Aug 2008
Posts: 3,166
USA

Re: Low pressure loads [Re: JHZR2] #4628878
01/09/18 04:43 AM
01/09/18 04:43 AM
Joined: Jan 2013
Posts: 1,843
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 1,843
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 .


Wyr
God bless
Re: Low pressure loads [Re: JHZR2] #4628891
01/09/18 06:14 AM
01/09/18 06:14 AM
Joined: Dec 2004
Posts: 1,530
Pennsylvania
Slick17601 Offline
Slick17601  Offline
Joined: Dec 2004
Posts: 1,530
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.

Re: Low pressure loads [Re: WyrTwister] #4628903
01/09/18 07:06 AM
01/09/18 07:06 AM
Joined: Dec 2002
Posts: 42,087
New Jersey
JHZR2 Offline OP
JHZR2  Offline OP
Joined: Dec 2002
Posts: 42,087
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.

Re: Low pressure loads [Re: JHZR2] #4628904
01/09/18 07:07 AM
01/09/18 07:07 AM
Joined: Jan 2010
Posts: 1,736
Rochester, NY
NateDN10 Offline
NateDN10  Offline
Joined: Jan 2010
Posts: 1,736
Rochester, NY
Did you guys miss the part where he said .45 ACP and that he doesn't reload?


2016 Mazda3 - 20,000 mi.
2011 Toyota Sienna - 100,000 mi.
Re: Low pressure loads [Re: NateDN10] #4628906
01/09/18 07:14 AM
01/09/18 07:14 AM
Joined: Dec 2002
Posts: 40,894
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,894
'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.

Re: Low pressure loads [Re: Reddy45] #4628908
01/09/18 07:14 AM
01/09/18 07:14 AM
Joined: Dec 2002
Posts: 42,087
New Jersey
JHZR2 Offline OP
JHZR2  Offline OP
Joined: Dec 2002
Posts: 42,087
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.

Re: Low pressure loads [Re: JHZR2] #4628919
01/09/18 07:28 AM
01/09/18 07:28 AM
Joined: Dec 2002
Posts: 40,894
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,894
'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.

Re: Low pressure loads [Re: JHZR2] #4628920
01/09/18 07:30 AM
01/09/18 07:30 AM
Joined: Oct 2010
Posts: 8,809
Virginia Beach
Astro14 Online content
Astro14  Online Content
Joined: Oct 2010
Posts: 8,809
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.

Last edited by Astro14; 01/09/18 07:31 AM.

32 Packard 15W40
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02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Low pressure loads [Re: Astro14] #4628921
01/09/18 07:34 AM
01/09/18 07:34 AM
Joined: Dec 2002
Posts: 40,894
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,894
'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

Re: Low pressure loads [Re: Shannow] #4628924
01/09/18 07:39 AM
01/09/18 07:39 AM
Joined: Oct 2010
Posts: 8,809
Virginia Beach
Astro14 Online content
Astro14  Online Content
Joined: Oct 2010
Posts: 8,809
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?


32 Packard 15W40
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Low pressure loads [Re: Shannow] #4628974
01/09/18 09:12 AM
01/09/18 09:12 AM
Joined: Jun 2011
Posts: 7,058
Mahzurrah!
KCJeep Offline
KCJeep  Offline
Joined: Jun 2011
Posts: 7,058
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.


09 Lincoln MKZ AWD 97k - M1 AFE 0w30
12 KIA Sedona 91k - PP HM 10w30
09 Ford Focus 131k - Supertech FS HM 5w30
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Re: Low pressure loads [Re: JHZR2] #4628989
01/09/18 09:31 AM
01/09/18 09:31 AM
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,858
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


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
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