Justin Holder
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Can .45 Auto Rimmed be fired in a Ruger Blackhawk .45 colt convertible fitted with a .45 ACP cylinder?
.45 Auto Rim question
- Thread starter Justin Holder
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Coyote3855
Member
I don't think so. I have a USFA .45/.45 ACP convertible. The ACP headspaces off a ridge in the chamber. There's no room between the cylinder and the frame for the rather thick rim of .45 Auto Rim.
highlander 5
Member
No,the cylinder is designed for 45 ACP.
ghitch75
Member
this^^^^^^.....you could if you had the cylinder cut for AR's..
No. The .45 AR is intended for .45 ACP revolvers which have enough room at the rear of the cylinder for the .45 ACP rim AND a moon clip. The .45 AR rim is as thick as the .45 ACP rim and the clip combined. The Ruger doesn't need a moon clip for extraction, since it uses an ejector rod, so the .45 ACP is seated with very little protrusion at the rear, not enough for the thick rim of the .45 AR.
The above assumes the OP was referring to the standard Ruger convertible, not a custom gun with an altered cylinder
Jim
The above assumes the OP was referring to the standard Ruger convertible, not a custom gun with an altered cylinder
Jim
Justin Holder
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- Apr 24, 2010
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Thanks, that is what I was thinking, I just needed confirmation.
Driftwood Johnson
Member
Yes. Midway USA lists a couple of manufacturers of 45 AR. I do not see Remington listed, even though they developed the cartridge. Starline makes brass. I load 45 AR with a standard set of 45 ACP dies, although it needs its own shellplate, and I fire them through my S&W Model 1917s.
Kaeto
Member
I load Auto Rim for my Webley which has the cut cylinder.
rcmodel
Member in memoriam
Colt & S&W 1917's.
All .45 ACP chambered S&W Model 25 & 625, as well as the Governor .45/410 revolver.
Taurus also makes .45 ACP revolvers.
rc
All .45 ACP chambered S&W Model 25 & 625, as well as the Governor .45/410 revolver.
Taurus also makes .45 ACP revolvers.
rc
Boxhead
Member
The AR is all I shoot in my Smith 25-2. I use the same 250 gr Keith as I do in my SA 45 Colt's.
Bikewer
Member
I had several of those Smith 1917s back in the day; you could pick them up at gun shows for around 50.00. Loaded auto-rim for all of them.
Great old guns. That would have been in the early 70s.
Great old guns. That would have been in the early 70s.
Driftwood Johnson
Member
They cost a little bit more than that now. This one was made in 1918. The ammo came with it. I won't be shooting that ammo, I usually shoot it with 45 AR.
Can .45 Auto Rimmed be fired in a Ruger Blackhawk .45 colt convertible fitted with a .45 ACP cylinder?
Not without getting the .45 ACP cylinder cut, then you can use .45 ACP and .45 AR interchangeably.
.45 AR may not be particularly commen, but brass is available, both Remington and Midway. Several of the smaller companies load it. When I load mine, I use the same die setup on my Dillon that I use for .45 ACP, just changing the shell plate. I use it in my modified Rugers as well as my S&W 25-2 and 625s.
Not without getting the .45 ACP cylinder cut, then you can use .45 ACP and .45 AR interchangeably.
.45 AR may not be particularly commen, but brass is available, both Remington and Midway. Several of the smaller companies load it. When I load mine, I use the same die setup on my Dillon that I use for .45 ACP, just changing the shell plate. I use it in my modified Rugers as well as my S&W 25-2 and 625s.
mes227
Member
And Reed's ammo. I have 300 or 400 .45ARs in inventory, shoot them all the time in my several .45acp revolvers.
Kaeto
Member
What kind of pressure do the commercially loaded AR's have?
Bikewer
Member
Here's a horror story... One of those weapons I had was a little "rough" as far as exterior finish goes, but one of my fellow recruits in the police academy back then wanted it badly. He "knew a guy" who would plate it for him.
So... I sold it.
He came back in with the pistol about a week later looking rather sheepish. Seems the "plating" guy worked in an automotve chrome-plating shop (remember when cars had chrome all over?) and had simply removed the grips and immersed the pistol in the tank.
Yes, it was beautifully chrome-plated and about as useful as a hammer..... It made a nice wall-hanger.
So... I sold it.
He came back in with the pistol about a week later looking rather sheepish. Seems the "plating" guy worked in an automotve chrome-plating shop (remember when cars had chrome all over?) and had simply removed the grips and immersed the pistol in the tank.
Yes, it was beautifully chrome-plated and about as useful as a hammer..... It made a nice wall-hanger.
highlander 5
Member
The last 45 AR ammo I Bought was from Black Hills IIRC. Bought 500 Starline cases awhile back with the Black Hills and the 100 Remington cases I stumbled on I'm in good shape. I am going to ty and load a few with a 250 gr SWCHP that I cast in the near future to see how they work.
You could have the chambers in a Ruger .45 ACP cylinder recessed, after which you could fire both .45 ACP and .45 Auto Rim cartridges. However I see no reason to do so. The purpose of the Auto Rim round was so one didn't have to use 1/2 moon clips in a hand ejector, and single action style revolvers don't use clips in the first place. This seems to be a answer looking for a question. 
You could have the chambers in a Ruger .45 ACP cylinder recessed, after which you could fire both .45 ACP and .45 Auto Rim cartridges. However I see no reason to do so. The purpose of the Auto Rim round was so one didn't have to use 1/2 moon clips in a hand ejector, and single action style revolvers don't use clips in the first place. This seems to be a answer looking for a question.
I think you can more easily get uniform headspacing of the Autorim by trimming the Ruger .45 ACP cylinder on a lathe, rather than drilling or milling individual recesses for each rim. Just a thought.
I have several reasons to convert the Ruger to Autorim: compatibility with the ammo I use most frequently in my S&W .45 ACP/AR revos; because I feel my Rugers cycle more smoothly with Autorim cases than they do with ACP cases; and because the Ruger is more sensitive to case .45 ACP length and headspacing than a 1911 or even a S&W 625, and .45 ACP case length, in my experience, varies all over the lot. Short cases that work fine in a 1911 due to the extreme firing pin protrusion available on the 1911 may not fire in the Ruger with much more limited firing pin protrusion.
I think you can more easily get uniform headspacing of the Autorim by trimming the Ruger .45 ACP cylinder on a lathe, rather than drilling or milling individual recesses for each rim. Just a thought.
I have several reasons to convert the Ruger to Autorim: compatibility with the ammo I use most frequently in my S&W .45 ACP/AR revos; because I feel my Rugers cycle more smoothly with Autorim cases than they do with ACP cases; and because the Ruger is more sensitive to case .45 ACP length and headspacing than a 1911 or even a S&W 625, and .45 ACP case length, in my experience, varies all over the lot. Short cases that work fine in a 1911 due to the extreme firing pin protrusion available on the 1911 may not fire in the Ruger with much more limited firing pin protrusion.
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