Pennsylvania Firearm Owners Association
Action alert on HB2011 regarding Pre-Emption

Rep Mike Turzai has committed to move HB 2011. This bill strengthens pre-emption by providing for standing and compensation of expenses in the event a local law needs to be challenged that conflicts with State gun laws. Corbett said he will sign if it is put on his desk in the remaining 11 days left to the legislative session.

For more information and updates on these efforts, and to get involved, CLICK HERE


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Old September 1st, 2010, 12:49 AM
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Default Shoot .45 ACP in .45 Long Colt

Okay! If you can shoot .38 Special ammo in a gun chambered for .357 Magnum, can you shoot .45 ACP ammo in a .45 Long Colt (Taurus Judge). The reason I ask is that it seems to be very difficult to find .45 Long Colt ammo. Sorry! I do not have either .45 ACP or .45 Long Colt in my hand to compare the two. The difference may be obvious.
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Old September 1st, 2010, 12:52 AM
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Default Re: Shoot .45 ACP in .45 Long Colt

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Originally Posted by Glenn Lynn View Post
Okay! If you can shoot .38 Special ammo in a gun chambered for .357 Magnum, can you shoot .45 ACP ammo in a .45 Long Colt (Taurus Judge). The reason I ask is that it seems to be very difficult to find .45 Long Colt ammo. Sorry! I do not have either .45 ACP or .45 Long Colt in my hand to compare the two. The difference may be obvious.
Headspacing.. Research that term.. Rimless cartridges headspace on the mouth of the casing. Where as rimmed cartridges headspace on the rim.

The only way that you could shoot 45acp in a 45Colt is to have the cylinder cut to use moon clips. ...so without having it machined, no - you cannot.
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Old September 1st, 2010, 12:58 AM
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Default Re: Shoot .45 ACP in .45 Long Colt

Thanks for the answer, Knight0034.
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Old September 1st, 2010, 04:18 PM
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Default Re: Shoot .45 ACP in .45 Long Colt

Even moon clips wouldn't be a very good solution. ACP chamber base diameter is .476, while 45 colt base diameter is .480. ACP neck diameter is .473, while 45 colt chamber is .480 at the neck. Those chamber dimensions may lead to casings splitting or rupturing.

Yes, there are a number of companies that will gladly mill your cylinder for you, but I don't think I'd recommend it.
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Old October 16th, 2010, 09:54 PM
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Default Re: Shoot .45 ACP in .45 Long Colt

.45 acp now comes also with rims. Haven't tried it yet, but it should work in the Taurus Judge. The bullet diameter of both the 45 colt and 45 acp is .451".
There will be about a 1/4" space after the end of the acp bullet but before the beginning of where the cylinder narrows. This could mess up the inside of the cylinder a little. Also, the acp's pressure is 21,000 compared to the colt's 14,000. So BEWARE!
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Old October 17th, 2010, 10:50 AM
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Default Re: Shoot .45 ACP in .45 Long Colt

Even 45 auto rim is not a good match for a 45 colt cylinder. Yes, they share bullet diameter, but they don't share case diameter.
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Old October 17th, 2010, 05:24 PM
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Default Re: Shoot .45 ACP in .45 Long Colt

The difference in case diameter between 45AR and 45 Colt is not a problem. A fair number of S&W 0.455 cylinders were bored through for 45 Colt and they work very well with 45AR. Been there, done that (and still do). The only potential problem is the relative thickness of the two rims. Would have to try the cases in a specific gun. Why not simply "roll your own"? I have been doing do for years; a slight expenditure up front but over time the costs are roughly 40-50% of new, and you can tailor your load to your own level of "happiness!" Dave_n
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