49willys
Member
Growing up I never heard anyone call the 45,45acp.It was always 45 auto.never saw a case that was head stamped 45 acp either.now in the last several years,it seems all i see and hear is people calling it 45 acp.did something change?
45 auto vs 45 acp
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fxvr5
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Nope.
LV Gun
Member
ACP = Automatic Colt Pistol , you will hear both terms 45 Auto or 45ACP . For some reason the descriptor seems to be a bit regional, where I used to live 45 ACP was used more frequently,, where I am now 45 Auto is commonly used. At the range on Sunday I was asked what I was shooting I said 45 ACP , the person asked me is that a new cartridge ? So I take the descriptors to be somewhat regional at least IMHO.
roval
Member
in another thread where the OP was having problems with his colt king cobra target 22 RF, i had to google what it meant and i have the same gun. i have never heard or read it in use. seems so non specific is it 22 mag, 22 short or 22 LR. i thought maybe the gun is now available in 22 WMR and that 22 RF was a synonym. i prefer 45 ACP myself.
Jim Watson
Member
Same as .44-40 and .32 New Police.
Other makers don’t want to put the original brand on their competing guns and ammo.
Consider the .32 SAP. Looks an awful lot like a .32 ACP or .32 Auto but Savage wanted their label on ammo for their guns.
Other makers don’t want to put the original brand on their competing guns and ammo.
Consider the .32 SAP. Looks an awful lot like a .32 ACP or .32 Auto but Savage wanted their label on ammo for their guns.
It's actually pretty common.
.380ACP is also called .380, .380Auto, 9mmKurz and 9mm Browning.
9mm is also called 9mmP, 9mm Parabellum, 9mm Luger, 9x19, 9mmx19, and 9mm NATO.
.40S&W is also called .40 Auto
.45Super brass is based on the stronger .45WinMag brass (or more accurately on .451 Detonics which was based on .45Win Mag). Standard .45ACP brass can be used, but it's not generally recommended practice.
.45ACP +P does not use different brass than standard pressure .45ACP.
.45ACP was loaded with smokeless powder from its inception.
As long as 45 comes first it couldn't get better. I have loaded 45 colt and 45 auto with the same cast bullet. Must have a 45 in it to be interesting.
This is like a Crescent wrench that has Proto on it. Channel lock or water pump pliers.
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fxvr5
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Starline's 45 Auto +P brass is different than their plain 45 Auto brass.
But that's only one company. Can't say about the others.
WisBorn
Contributing Member
I have read that other companies beef up the brass that they load +p loads in, compared to standard pressure.
FL-NC
Member
45 ACP is what is on the gun, or brass head stamp as I recall. 45 auto is what I say.
lightman
Member
I think LV Gun nailed it in his post. If I'm talking about it I call it "auto". If I'm writing about it I write "ACP".
Jim Watson
Member
Originally the guns were marked:
Automatic Colt
Calibre 45 Rimless Smokeless
So couldn't we call it the .45 RS? No headstamp like that, though.
Later it became:
Colt Automatic
Calibre 45
Note 1: Colt wrote "Automatic" right on the guns, so don't lecture on "semiautomatic" jargon.
Note 2: Calibre stamp was "45", no decimal point in the roll marks.
Automatic Colt
Calibre 45 Rimless Smokeless
So couldn't we call it the .45 RS? No headstamp like that, though.
Later it became:
Colt Automatic
Calibre 45
Note 1: Colt wrote "Automatic" right on the guns, so don't lecture on "semiautomatic" jargon.
Note 2: Calibre stamp was "45", no decimal point in the roll marks.
epags
Member
There's nothing preventing them from doing that--SAAMI doesn't spec anything but external dimensions.
Some ammunition/case manufacturers (Starline is one) use thicker brass for .45ACP+P vs standard pressure .45ACP ammo, but that's not a hard and fast requirement. Some manufacturers use the same brass, just with a different headstamp.
The point is that there's no convention that .45ACP+P brass is any different than standard pressure .45ACP brass. One can find .45ACP +P brass that is no different than standard pressure .45ACP brass--and one can also load +P loadings into standard .45ACP brass. The fact that one or more manufacturers choose to make their .45ACP +P brass thicker doesn't change any of that. The bottom line is that the comment I responded to ( "The 45auto+P casings is like the original but the walls are thicker..." ) is misleading. One can't assume that .45ACP +P cases are any different than standard pressure .45ACP cases.
Jim Watson
Member
Some guy name of Elmer said:
"Today we often hear the .45 Colt Peacemaker cartridge referred to as the .45 Long Colt. Some newcomers to the game claim there is no such animal, but if they had shot the short variety that Remington turned out in such profusion before, during, and after WW I, they would see there is some basis for referring to the .45 Colt as the .45 Long."
"Today we often hear the .45 Colt Peacemaker cartridge referred to as the .45 Long Colt. Some newcomers to the game claim there is no such animal, but if they had shot the short variety that Remington turned out in such profusion before, during, and after WW I, they would see there is some basis for referring to the .45 Colt as the .45 Long."
hutch51
Contributing Member
1. Glad my mouth wasn't full of coffeeI think it is best known, especially in the USA, as the 11.43X23MM.
2. Down the rabbit hole I went. Found -
Terry G
Member
"Of course it's .45 Long Colt, it's a Colt and look how long the barrel is,"
fxvr5
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