.45 Auto Rim Loads


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Joseph M.Moger
February 27, 2010, 01:33 PM
.45 Auto Rim need some reload ideas.{powder & charges}
Using 45 Cast Lead SWC Plinking
Also .451 185 gr. HP/XTP bore cleaner
Thx.
J.M.

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rcmodel
February 27, 2010, 01:38 PM
Looked in a reloading manual?

Hornady & Speer manuals have .45 AR chapters.
As does the Lyman #49.

Plus, in general, all .45 ACP standard data is interchangeable.

rc

Quoheleth
February 27, 2010, 01:39 PM
I'm about 98% sure you can use any .45ACP data, as the ACP and Auto Rim are basically the same case, but rimless vs. rimmed.

Be aware that the auto rim was made for the 1917 Colt and Smith revolvers, so if you're loading for the auto rim, you're probably loading for a century-old gun. I would stay at the bottom (read: mild) end of loading data and don't mess with high end of +P stuff.

YMMV, IANAL, etc.

Q

Gordon
February 27, 2010, 02:16 PM
For many years I used a Henley and Gibbs #68 gang mold which drops 200 grain long flat nose bullets. Lee has a similar mold. I wanted to use Lymans 255 Grain LSWC mould I have , but always came back to the 200 grain SWC as it produced much tighter groups in all the 1917-1955 pistols I shot them in. 7 grains of Unique gets close to 950 fps in a 5" gun and is quite a powerful load. 6 grains Unique cuts it down to just over 800 fps and is a very mild plinking load.

DickM
February 27, 2010, 03:32 PM
Be aware that the auto rim was made for the 1917 Colt and Smith revolvers, so if you're loading for the auto rim, you're probably loading for a century-old gun.

Not necessarily. I load .45 AR for my Smith Mod. 25-2, which was made in 1975. The same basic model continued in production until 1999, was discontinued, and subsequently re-introduced in the Heritage series. Any .45 ACP recipe works fine.

rcmodel
February 27, 2010, 03:41 PM
Plus, the 625 stainless series has been in continous production in one form or another since it was introduced in 1989. They are still in production today.

rc

mec
February 27, 2010, 05:15 PM
you need to get a roll crimp die if you can find one. None available from the usual sources the last time i looked. Taper crimped round will usually walk forward in the case with the round going squib and sticking a bullet in the barrel.

Gunfighter123
February 27, 2010, 05:26 PM
I'm about 98% sure you can use any .45ACP data, as the ACP and Auto Rim are basically the same case, but rimless vs. rimmed.

Q --- I agree with you and RC , BUT I WILL raise you ----- I'd say 99.9% of ACP loads will be fine in the AR cases !!!!

Its always worked well for me no matter what bullet or powder brand.

Stainz
February 28, 2010, 05:59 AM
I use Starline .45 AR brass in my Dillon 550 press with Lee carbide .45 ACP dies, including the resizer crimper. I've been shooting .45 ARs in a 4" 625-8 since 9/02 - the last 5+ yr in a 625JM. You need a thicker rim-spacing shellplate, but that's it. The interesting thing I learned when I made twelve rounds with the Lee .45 Colt carbide die set's roll crimp ring for the taper crimper is seen below:

Load: 255gr LSWC (Oregon Trails) over 5.3gr Titegroup, Starline .45 AR brass, Federal LP primer.
Taper crimp: 884 +/-11 fps
Roll crimp: 887 +/-18 fps

The brass was bought new and has never been length-sized. The greatest OAL 'growth' the sixth round has ever achieved after firing the first five similsr rounds is .003" - and that was in both the roll and taper crimp examples above. At 4.5-4.8 gr Titegroup levels, yielding 785 - 850 fps, the OAL 'growth' was nil to .001". For simplicity, I went back to the taper crimper. That 5.3 gr is my max load - 4.5-4.8 gr Titegroup is my usual 255gr LSWC. The Auto Rims get essentially my .45 Colt loads - at higher velocities. Sorry, I cannot speak to the paper/bullseye capability. All loads agree with manufacturer loads. YMMV.

The .45 AR is a neat round.

Stainz

ClemY
February 28, 2010, 07:46 AM
I have been loading .45 AR for about 35 yrs. These days I mostly use Starline and Remington brass, loading it on a Dillon 550 using my .45 ACP die setup, including taper crimper. I like the 200 SWC H&G 68 type bullets and 250 SWC heavy weights. I typically use 231 and Universal for the 250s. Works fine in my 25-2 and 625JM.

Sport45
February 28, 2010, 08:50 AM
Joseph, welcome to The High Road!

Using 45 Cast Lead SWC Plinking
Also .451 185 gr. HP/XTP bore cleaner

What weight SWC bullet do you plan to use. It makes a difference. Go to the Hodgdon, Alliant, Accurate, or other powder suppliers website for generic load data.

XTP's for a bore cleaner? Brushes are a lot cheaper in the long run and jacketed bullets can iron the leading into the lands making it even harder to get out. With the right cast bullets you don't really get leading. If you do some copper pot scrubber mesh wrapped around a bore brush will take it out quickly.

earplug
February 28, 2010, 11:07 AM
In 45 ACP brass.
For plinking in my 625. Lee mold cast 200 grain SWC 3.5 grains of Bullseye
For USPSA which might make power factor. Leemold 225 grain RN 3.7 grains of CLAYS

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