.45 LC vs. .45 ACP


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Jayhawker
October 16, 2011, 02:24 PM
Given all things equal, including quality of the gun and the reload, if you put both in a Ransom Rest at 25 yards, which revolver will be the more accurate?

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rcmodel
October 16, 2011, 02:31 PM
Should be a draw. Especially at 25 yards!
50 yards would be a better test!

IMO: Neither caliber has any inherent accuracy advantage with quality reloads & quality bullets.
I believe you would be more likely find more difference in two guns of the same make & model chambered in each caliber.

And historically, there have been more chamber throat & barrel bore size variations in .45 Colt guns then in .45 ACP guns.

I would say though that given two guns capable of exactly the same accuracy?
Factory .45 ACP Match or most factory SD loads will out shoot most standard factory .45 Colt loads at 50 yards in a Ransom rest.

The .45 ACP has the advantage of about 75 years of Bullseye competition pushing ammo & gun development to match accuracy standards.

rc

StrawHat
October 16, 2011, 02:31 PM
The one in which the bullets match the bore better.

All things being equal, it will be a draw.

JustsayMo
October 16, 2011, 03:06 PM
Based on mine, I don't know if there really is much difference in accuracy. Both shoot very well. I tend to shoot my 45 Colts better offhand. The 45 Colt is a lot less limited as to bullet weight and charge too so the impact on the target is more impressive too with the heavier bullet and faster velocity.

http://www.youtube.com/watch?v=4w3I6EisXHU

CraigC
October 16, 2011, 03:45 PM
It will depend more upon differences between individual guns and preferred loads than anything inherent with either cartridge.

Hondo 60
October 16, 2011, 03:51 PM
Neither is more inherently accurate than the other.

Both calibers are over 100 years old so any issues were worked out decades ago.

My advise? Get one or two of each & shoot the heck outta 'em!
(that's what I did) :D

Pyro
October 16, 2011, 03:55 PM
I'd take the .45 LC because I prefer revolvers.

rcmodel
October 16, 2011, 04:14 PM
The OP ask about revolvers.
One in .45 ACP, and one in .45 Colt.

Say a matched pair of S&W's, or Freedon Arms, or?

rc

ghitch75
October 16, 2011, 04:32 PM
get a Blackhawk 45C/45ACP conversion best of both worlds.....both are dead on at 25y...


http://i1202.photobucket.com/albums/bb368/ghitch75/S3010324-1.jpg

Dnaltrop
October 16, 2011, 04:49 PM
For some reason this thread makes me wonder if Coonan could manage a 45 colt version of their .357mag-1911.

Jayhawker
October 16, 2011, 04:54 PM
I've got a Coonan .357 Mag on order and all the delays in getting it are bad enough without wondering about a new (for them) caliber.

Jayhawker
October 16, 2011, 05:01 PM
rcmodel:

A couple of Freedom Arms revolvers would sure fill my hands but empty my bank account.

CraigC
October 16, 2011, 05:07 PM
Both calibers are over 100 years old so any issues were worked out decades ago.
On the contrary, newer chamberings tend to be far more consistent. Few manufacturers can seem to get their .45Colt dimensions right.

rcmodel
October 16, 2011, 05:13 PM
+1

And like I said before, the .45 Colt was never a Bullseye competition match round like the .45 ACP.

So very little if any real accuracy development was ever done with factory ammo.

rc

CraigC
October 16, 2011, 05:43 PM
And it usually takes a custom gun with a properly chambered cylinder and correct bore size for the .45Colt to realize its accuracy potential. Most .45ACP's, like most .44Mag's (also often compared to the .45Colt), tend to be more accurate out of the box. Nobody ever has a custom cylinder built in .44Mag but gunsmiths have built their livelihood around making accurate .45Colt's. So really, for "all else to be equal", it would have to be a Freedom Arms or USFA convertible sixgun. Even Colt can't get their .45Colt dimensions right.

barnetmill
October 16, 2011, 06:16 PM
Assume same revolver type and barrel, the .45 LC has a theoretical advantage in the typical cylinder length of a revolver for there is less travel (free bore) of the bullet prior to making contact with the rifling of the barrel. In real life it would be interesting to see this tested to see if there is a practical different

19-3Ben
October 16, 2011, 08:11 PM
Assume same revolver type and barrel, the .45 LC has a theoretical advantage in the typical cylinder length of a revolver for there is less travel (free bore) of the bullet prior to making contact with the rifling of the barrel.
+1
That was exactly my very first thought when I read the question.

ugaarguy
October 16, 2011, 08:22 PM
Assume same revolver type and barrel, the .45 LC has a theoretical advantage in the typical cylinder length of a revolver for there is less travel (free bore) of the bullet prior to making contact with the rifling of the barrel. In real life it would be interesting to see this tested to see if there is a practical different
Even if you used an ideal length .45 ACP cylinder, you still have to deal with head space. In a hand ejector or top break you'll need a moon clip to eject the cartridges, unless you do something weird like the S&W 547 system. Either way, without some serious work you may not get the .45 ACP cases to head space perfectly. In a single action with gate loading & ejection (like a Ruger Blackhawk) you should be able to get the ACP cases to head space on the case mouth consistently. Clear as mud, right?

336A
October 16, 2011, 08:33 PM
Here is the best info I as able to find. Hope this helps you out.
http://www.gunblast.com/Ruger-NV45ACP.htm

http://www.gunblast.com/Ruger-Lipseys45Flattop.htm

ClemY
October 16, 2011, 10:09 PM
All things being equal; all things are never equal. But the smaller case size of the .45 ACP tends to give it a slight edge in uniformity of ignition over the .45 Colt, but you would need an extensive study using something like a Ransom Rest to prove anything, and then the margin would probably be pretty small.

CraigC
October 16, 2011, 11:04 PM
All things being equal; all things are never equal. But the smaller case size of the .45 ACP tends to give it a slight edge in uniformity of ignition over the .45 Colt, but you would need an extensive study using something like a Ransom Rest to prove anything, and then the margin would probably be pretty small.
Agreed, 100%.

ugaarguy
October 16, 2011, 11:20 PM
All things being equal; all things are never equal. But the smaller case size of the .45 ACP tends to give it a slight edge in uniformity of ignition over the .45 Colt, but you would need an extensive study using something like a Ransom Rest to prove anything, and then the margin would probably be pretty small.
If anyone would like to send me a Ransom rest, and both a .45 ACP & .45 Colt barrel for a T/C Contender I'll be happy to use my Contender to do the testing. I'll even do the hand loading & buy the factory ammo myself. :D

barnetmill
October 17, 2011, 12:42 AM
If anyone would like to send me a Ransom rest, and both a .45 ACP & .45 Colt barrel for a T/C Contender I'll be happy to use my Contender to do the testing. I'll even do the hand loading & buy the factory ammo myself.

You have to use the same barrel or at least barrels cut from the same length of a longer rifle barrel and even then the barrels might not be the same. The other solution is to use many barrels and then one has to decide on the loads to be used. In a revolver the .45 ACP has the advantage of being cheaper to purchase and the .45LC can take greater charges. Both are accurate enough for field shooting and very few shooters use the revolver for bullseye shooting where a slight increase accuracy would be greatly beneficial.

Hondo 60
October 18, 2011, 12:00 AM
Few manufacturers can seem to get their .45Colt dimensions right.

Gee, I think someone did something right. (and yes, those are holes from a 45 Colt)

http://www.jbabcock.net/guns/uberti_target.jpg

ClemY
October 18, 2011, 06:26 AM
I think the Gun Blast tests of the two Rugers is instructive. Two guns, each using the same barrel with two cylinders. .45 ACP has a slight edge.

Lawdawg45
October 18, 2011, 07:31 AM
I used to have a Blackhawk in .38/.357/9mm, and the .38 was more accurate than the 9mm out of the same gun.

LD

ClemY
October 18, 2011, 08:06 AM
You are lucky you got anything better than patterns with the 9mmthings cylinder. Mine has. 358" throats,which is pretty oversized for. 355" bullets. In spite of that, mine actually shoots CCI Blazer quite well.

StrawHat
October 18, 2011, 08:48 AM
Two S&W 45s

http://i214.photobucket.com/albums/cc194/StrawHat/Model25family005.jpg

The 45 ACP is chambered in the top revolver. Both are accurate and easy to handle. For years I preferred the ACP but recently have begun to favor the long Colt chambering.

S&W has been building target revolvers in 45 ACP for decades. And they shot well with or without clips. It was not uncommon to see competitors unloading the ACP empties from the cylinder with a short rod, very carefully.

That said, when Ross Seyfried had a MOA revolver built, he chose the 45 long Colt for the chambering. And got one inch (or less) groups at 100 yards.

CraigC
October 18, 2011, 12:12 PM
Gee, I think someone did something right.
And I've got a New Frontier with .457" chamber mouths but it still manages to shoot a .452" 250gr RNFP over 9.0gr Unique, or a .452" 275gr LFN over 2400 into one ragged hole at 25yds. However, you can't always expect a sixgun with grossly oversized chamber dimensions to shoot that well.

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