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View Full Version : .45Auto Vs. .45ACP Whats The Difference?


Rugerman
01-06-2007, 9:45 PM
what are the main differences? also this is of topic but it is a pistol section, so the SA XD 4inch Model has a 14 round mag i believe. Correct? you cant have any mags over 10 rounds regardless rifle or pistol right? Thanks in advance

courteousgavin
01-06-2007, 9:48 PM
45 Auto and 45 ACP (Automatic Colt Pistol) are the same thing.

The law for magazines are the same for both rifle and pistol mags.

bwiese
01-06-2007, 9:49 PM
"45 auto" is a generic term that means "45ACP".

There's a new 45 round for automatic pistols, called the 45GAP ("Glock automatic pistol" that is a physically shorter round with supposedly same performance. It's a new round and it remains to be seen if this will get any marketplace traction besides Glock.

You cannot acquire new hicap magazines (those over 10 rounds) in CA. If you owned exsiting hicap magazines in CA before 1 Jan 2000, you can retain and use them. Otherwise its 10 rounds or less.

Rugerman
01-06-2007, 10:02 PM
thanks guys. just wanted to make sure. AND one more thing. which is cheaper and/or fun the shoot? .40S&W or .45ACP

Aluisious
01-06-2007, 10:06 PM
thanks guys. just wanted to make sure. AND one more thing. which is cheaper and/or fun the shoot? .40S&W or .45ACP
40 is cheaper, I believe, but 45 is more fun in my opinion, and the opinion of many.

It's not as loud, the recoil isn't as sharp, and there are many excellent weapons designed around 45. The 1911 design comes to mind.

RT13
01-06-2007, 10:55 PM
.357sig is even more fun to shoot. But the .45 is my favorite round.:)

Aluisious
01-06-2007, 10:56 PM
I just ordered another 1k rounds of 45 on the net.

It won't last long.

KIDRR
01-07-2007, 1:42 AM
.45ACP is my favorite pistol round. Very enjoyable to shoot. .40 is so jumpy

naimad
01-07-2007, 7:24 AM
thanks guys. just wanted to make sure. AND one more thing. which is cheaper and/or fun the shoot? .40S&W or .45ACP

Both of these rounds are fun to shoot if you looking for a first gun for target or defense the 40 s&w is a great choice the ammo is a little cheaper so you can shoot more.

Fjold
01-07-2007, 7:39 AM
"45 auto" is a generic term that means "45ACP".




Also, a number of gunmakers are using "45 AP" interchangeably with "45 ACP".

Slamer
01-07-2007, 10:48 AM
I once bought some brass from an E-bay for "45 AUTO" and it turned out as "45 AUTO RIM" ...same dimensions as ACP but headspace is 516 rather than 480

CSACANNONEER
01-07-2007, 11:00 AM
[QUOTE=Slamer]I once bought some brass from an E-bay for "45 AUTO" and it turned out as "45 AUTO RIM" ...same dimensions as ACP but headspace is 516 rather than 480[/QUOTE


How much rimmed do you have? I'll trade you for 45acp if you want.

Rugerman
01-07-2007, 1:43 PM
so .40 is cheaper but .45 is more fun to shoot....... I'm looking for HD and an all around pistol maybe even for some rabbits. I 'm thinking about the Sig 220 Equinox but 1k is a little over the budget. i'm looking for around $600 so i was thinking the SA XD in .45 or .40S&W And does anyone here have the 4inch ported model?

HKROB
01-07-2007, 2:34 PM
If you want a sig you might want to look at the CPO (red box ) p226 or p229 in .40 sw they cost $500-600. I have a sig p226 40 sw & HK usp .45 acp I love them both

shonc99
01-07-2007, 2:41 PM
What is the difference between rounds as I don't own one but have a friend who has a revolver and uses the moon clips. I know there is a rimmed round for the revolvers but what exactly is the difference or benefit?

azn_wrx
01-07-2007, 2:48 PM
There is also a .45 long colt

Rugerman
01-07-2007, 3:40 PM
how much does an HK USP cost in SoCal? And whats CPO redbox. Sorry kinda a newb to handguns.

Slamer
01-07-2007, 6:04 PM
Hello CSACANNONEER...it was a few years back and I couldn't use it so sold it to a metal recycler.

Jon
01-07-2007, 7:00 PM
Rugerman, CPO refers to Sig Sauer's Certified Pre-Owned handguns (they come in a red box).

As far as the HK, I'd expect you to pay between $750-850, depending on the dealer.

HKROB
01-07-2007, 7:02 PM
how much does an HK USP cost in SoCal? And whats CPO redbox. Sorry kinda a newb to handguns.
HK USP $650-800 (used vs new)
a red box is a (certified pre-owned)fresh from sig they come in a red box all new pistols come in blue boxes
http://web2.atlanta.gbhinc.com/Auction/ViewItem.asp?Item=63534141 (CPO)http://web2.atlanta.gbhinc.com/Auction/ViewItem.asp?Item=63348948 (NEW)

courteousgavin
01-07-2007, 7:40 PM
What is the difference between rounds as I don't own one but have a friend who has a revolver and uses the moon clips. I know there is a rimmed round for the revolvers but what exactly is the difference or benefit?

Cartridges designed for revolvers usually have a rim for the cartridge to headspace on, to hold them in the correct position for firing. But the 45 ACP was designed for an auto loader, so it headspaces against the case mouth. This rimless design is easier to feed through magazines because the rims don't hang up against each other. When the US was about to enter the fighting in WWI we didn't have enough of the new M1911 pistols in inventory, so Smith & Wesson figured they would adapt one of their revolvers to fire the 45 ACP ammo so they could sell it to the Army. That's where the half moon clips came into the picture. They are used to hold the rimless 45 ACP rounds in the correct position for firing in a M1917 revolver. Later on Remington came out with the 45 Auto Rim cartridge just so people could load them into their 45 ACP M1917 revolvers without having to use the half moon clips. With such a limited application, the 45 Auto Rim cartridge didn't really catch on.

shonc99
01-07-2007, 11:54 PM
Cartridges designed for revolvers usually have a rim for the cartridge to headspace on, to hold them in the correct position for firing. But the 45 ACP was designed for an auto loader, so it headspaces against the case mouth. This rimless design is easier to feed through magazines because the rims don't hang up against each other. When the US was about to enter the fighting in WWI we didn't have enough of the new M1911 pistols in inventory, so Smith & Wesson figured they would adapt one of their revolvers to fire the 45 ACP ammo so they could sell it to the Army. That's where the half moon clips came into the picture. They are used to hold the rimless 45 ACP rounds in the correct position for firing in a M1917 revolver. Later on Remington came out with the 45 Auto Rim cartridge just so people could load them into their 45 ACP M1917 revolvers without having to use the half moon clips. With such a limited application, the 45 Auto Rim cartridge didn't really catch on.


Thank you for the very informative lesson. I knew there was a story behind the rimmed/ rimless issue. Thanks:)