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Old April 28, 2007, 09:13 PM   #1
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Noob; PMC brass and cleaning


I've been shooting alot of PMC ammo (7mm Mag) and kept the brass in case one day I want to reload. Well, I just got my new Lee reloader, and want to know if PMC brass is ok to reload with.

Also, do you clean brass in a tumbler before or after you deprime it?

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Old April 28, 2007, 09:20 PM   #2
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That's Remington Peters brass. It's fine to reload. Wheather to clean before or after depriming, there is much debate. I tumble before depriming, then clean primer pockets with a primer pocket cleaning tool.
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Old April 29, 2007, 02:30 PM   #3
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I clean first. Then I resize and deprime. Then I will tumble them for 15 minutes to clean off the lube. After cleaning again I will trim if needed. Then I will load them.
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Old April 29, 2007, 02:55 PM   #4
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From 1960 to 1990 I cleaned all my brass by hand. When I started competetive pistol shooting, I got a tumbler.

Cleaning primer pockets, especially pistol cases, is an exercise in futility. 35 years ago, I completed a 5 year accuracy study of cleaned vs noncleaned pockets on 5 of my rifles. I no longer clean primer pockets.

Depriming then tumbling will only serve to get lots of flash holes filled with media, with lots of extra time inspecting and removing crud. There is no reason to deprime before tumbling and it is an unecessary extra step, especially if you load with a progressive.

Minor build up of burned powder residue inside the case is relatively unimportant. It only comes into play when it reduces case volume, and light tumbling with walnut usually removes enough so that it is not a significant reduction to volume.

Don’t confuse stained or discolored cases with dirty cases, as the cases are cleaned of dirt and grime after a short time in the tumbler, and are clean enough for reloading. A general rule of thumb is to use walnut to clean, and corn cob to polish. Although I have never tried the mixing of the two, Idano has suggested a 50/50 mix of corn cob and walnut. I will be trying that in the future.

I have never read an article that said primer pocket cleaning increases accuracy.
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Old April 29, 2007, 03:04 PM   #5
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About PMC

The original parent company, a U.S. corporation registered in Delaware, was founded in the late 1970's in New York as Patton Morgan Corporation. It began operations by importing military style small arms ammunition and .22 rimfire ammunition manufactured in South Korea. The ammunition was sold then, as it still is, under the registered brand name "PMC Ammunition", and the original slogan, "Precision Made Cartridges" has never changed.

Several years later, the company moved to Los Angeles, California, and its name was changed to Pan Metal Corporation. In addition to its ammunition business, the company also dealt in other facets of the metals business. Early in the 1980's, the increasingly successful ammunition line was expanded to include hunting (soft point) cartridges in the rifle calibers, and hollow points in the handgun ammunition.

In 1988, factory facilities were purchased near Boulder City, Nevada, for the production of ammunition to supplement the Korean imports, and for the purpose of producing two new lines of high performance cartridges. These were the Starfire handgun ammunition for law enforcement and home and personal defense, and X-Bullet rifle ammunition for big game hunting, which were introduced to the market in late 1991. In 1996, shotgun shells were added to the line.

The factory is operated under the name Eldorado Cartridge Corporation, and is a subsidiary of Pan Metal Corporation.

Today, the company's continuously expanding small arms ammunition product selection includes a full line of centerfire rifle and pistol ammunition, rimfire ammunition, shotgun shells, and reloading components. Recently, a new company known as B.C. Outdoors was incorporated and became a part of the "Eldorado Cartridge Corporation Group of Companies." B.C. Outdoors imports the Verona line of quality superposed shotguns from Italy. The company's stated purpose, like that of Eldorado Cartridge Corporation, is "to provide high quality outdoor products to its customers at a reasonable price."

During its more than two decades of ammunition production and sales, PMC Ammunition has become very well known in the United States and other countries of the world as a source of high quality small arms cartridges. The firm is now considered the fourth largest ammunition company in the United States.

MR22, you may be thinking of UMC, or Union Metalic Corporation, also known as R-P.

I have some Korean made PMC ammo made for M-1 garands, that were in-service for the south Korean military. It's good stuff for blasting ammo, and is reloadable.

Liquor, you should have no trouble loading that 7mag PMC brass. As for how it rates as oposed to the big 3, I only have experience with the 0-6 ammo, and some .223 brass I got from midway. It seems to do as well as anything else I load.
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Old April 29, 2007, 03:43 PM   #6
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Yep Had UMC on the brain. I have no experience with PMC.
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Old April 29, 2007, 05:43 PM   #7
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I have had very good success using PMC brass in several calibers, both handgun and rifle. It's good stuff in general.

Like those above, I deprime after tumbling. It saves the bother of having to get corncob media out of the flash hole. To some, that's not a real problem since a grain or two isn't going to cause a squibb or any measurable difference in cartridge performance. I just don't like having extraneous grains in there.
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Old April 30, 2007, 01:23 AM   #8
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Was using once fired PMC brass in my 6.5x55 and found they were getting faint cracks ie imminent c/h separation after only 1 reload. Was talking to my gunsmith about it and he said PMC brass was normally quite hard/brittle? Annealing prob help a bit? My 0.02c
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