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.45 auto rim in a Blackhawk .45 acp cylinder?

This is a discussion on .45 auto rim in a Blackhawk .45 acp cylinder? within the Reloading forums, part of the Firearm Forum category; Can I shoot .45 auto rim in my .45 acp blackhawk cylinder?...


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Old May 9th, 2017, 11:50 AM   #1
 
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.45 auto rim in a Blackhawk .45 acp cylinder?

Can I shoot .45 auto rim in my .45 acp blackhawk cylinder?



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Old May 9th, 2017, 12:18 PM   #2
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I am not fully positive on this, but I think that you will find the 45 auto rim is too thick and will end up dragging on the breech face of the revolver and cylinder will not rotate.
Cut down 45 Schofield cases will work. Some call it 45 special where you trim the length of the Schofield cases to 45 ACP length. The rim on the Schofield cases are thinner and will allow rotation of the cylinder without any binding. I use the "45 special" cases in my Ruger Birdshead 45 ACP revolver on a regular basis.
The ammo in the photo are 45 ACP and not the trimmed down 45 Schofield cases.
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Old May 9th, 2017, 01:21 PM   #3
 
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What about cutting a .45LC case to acp specs?
I just got done trimming one and resized it with the .45LC resize/decapping die, then ran it through the .45 acp resizing/decapping die.
It fits and rotates in the gun.
From what I understand, the .45LC has thicker case walls than the acp right?
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Old May 9th, 2017, 01:24 PM   #4
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HBK is right ... 45 auto rim have thick rims so they won't deal well with Blackhawk headspace. Several years ago, Starline made a batch of "45 Cowboy" brass. These cases were the same dimensions as a 45 Auto Rim except rim thickness so they would fit and function in a 45 ACP cylinder. I could see the extraction advantage in a DA revolver but in a SA revolver, the ejector works equally well with rimmed or non-rimmed cases so why bother. Further, the loading channel in a Blackhawk is not rim friendly so the case has to be aligned perfect or it won't extract.
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Old May 9th, 2017, 01:24 PM   #5
 
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So my thinking is, would I be able to load a modified .45LC case to .45 acp load data?
Forget about practicality, Will it work?
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Old May 9th, 2017, 04:54 PM   #6
 
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As to cutting down .45 Colt cases to .45 ACP length, I've been doing this for about a year now. Cut to ACP length, I use .45 ACP dies with a .45 Colt shell holder. Works both in the ACP cylinder and the .45 Colt cylinder.



As to how well it works:



I've been using HP-38 and a 200 gr. RNFP bullet but have no targets to show for it. Also I've yet to fire these rounds, I call it the .45 Xtra Short, in a .454 Colt cylinder. This has been a good way to salvage split .45 Colt brass.

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P.S. Incidentally, with the 200 gr. bullet, recoil is nil, and extraction is very quick! Useless for just about anything practical, but lots of fun to shoot! And, yes, any .45 ACP load can be used. Also hot ACP loads, using the 185 gr. JHP, probably would make a good varmint load.
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Old May 9th, 2017, 05:14 PM   #7
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Bob Wright, What you created is exactly what Starline made with the 45 Cowboy brass.
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Old May 9th, 2017, 08:16 PM   #8
 
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or you could use 45 schoefield brass which will work in 45 colt cylinder and handload to 45 acp specs. Most people who use 45 schoefield do it to get light loads safely without worrying about double charges which are easy in a 45 colt case.
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Old May 9th, 2017, 08:53 PM   #9
 
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Quote:
Originally Posted by Bob Wright View Post
As to cutting down .45 Colt cases to .45 ACP length, I've been doing this for about a year now. Cut to ACP length, I use .45 ACP dies with a .45 Colt shell holder. Works both in the ACP cylinder and the .45 Colt cylinder.



As to how well it works:



I've been using HP-38 and a 200 gr. RNFP bullet but have no targets to show for it. Also I've yet to fire these rounds, I call it the .45 Xtra Short, in a .454 Colt cylinder. This has been a good way to salvage split .45 Colt brass.

Bob Wright


P.S. Incidentally, with the 200 gr. bullet, recoil is nil, and extraction is very quick! Useless for just about anything practical, but lots of fun to shoot! And, yes, any .45 ACP load can be used. Also hot ACP loads, using the 185 gr. JHP, probably would make a good varmint load.
WOW. NICE looking Single action there Bob.
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Old May 10th, 2017, 06:13 PM   #10
 
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Thank you all.
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Old May 12th, 2017, 07:33 PM   #11
 
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I've heard you can get a few thousandths milled off the back of your ACP cylinder to allow the AR cases to work and it won't effect ACP usage.
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Old May 13th, 2017, 08:19 AM   #12
 
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Quote:
Originally Posted by Iowegan View Post
Bob Wright, What you created is exactly what Starline made with the 45 Cowboy brass.
I know Iowegan, but just couldn't bring myself to call it ".45 Cowboy Special." Calling it .45 Xtra Short just sounded more "old timey."

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Old May 13th, 2017, 08:22 AM   #13
 
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Quote:
Originally Posted by bwinters View Post
or you could use 45 schoefield brass which will work in 45 colt cylinder and handload to 45 acp specs. Most people who use 45 schoefield do it to get light loads safely without worrying about double charges which are easy in a 45 colt case.
What you say is true, of course, but .45 Smith & Wesson brass, or .45 Schofield, is not so readily available. I get plenty of old .45 Colt brass that I would otherwise discard that have split necks. And as some pint out, .45 ACP brass is readily available, often free.

And, my .45 Xtra Short can be fired in either the .45 Colt or .45 ACP cylinder.

Bob Wright
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