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Old September 17, 2006, 05:12 PM   #1
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Accurate #2 Powder

I loaded some 9mm rounds of varying power using Accurate #2 and shot them in my Glock 19, but I noticed after a few rounds that it left little bits of sand colored powder residue lying around in the chamber. Is that normal? It doesn't look like it's good for the gun.
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Old September 17, 2006, 11:17 PM   #2
Mal H
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When you get sandy residue left in the case/chamber/barrel, it's almost always unburned powder. Some causes are loose or no crimp, too low a powder charge for the caliber/bullet weight, or a weak primer (rare).

AA #2 is a good burning fast powder and usually burns well in the 9mm. Check to see if any of the above factors might be at fault.

Please give us some details of your loads: powder weight, bullet, primer, etc.
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Old September 18, 2006, 08:59 AM   #3
Mike Irwin
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No matter what powder you use, you're virtually guaranteed of getting some unburned powder residue.
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Old September 18, 2006, 09:49 AM   #4
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I use AA#5 for 9mm and .45ACP reloading. I get a little soot, but not one grain of unburned powder.
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Old September 19, 2006, 11:27 PM   #5
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RE--Accurate #2 Powder

I would like to echo that. .45acp loads are 8grs of AA#5 and 6grs of AA#2 behind a 240gr hard cast SWC from Oregon Trail with a CCI magnum primer. Standard taper crimp from Speer dies. 9mm, .38spl, .357mag, .44spl, and .44mag have all been loaded with the same powder and all showed the same problems, the revolvers got a solid roll crimp. Lots of smoke, okay the lube on the slug is burning, but lots of powder unburned in the guns and all over the bench in front of the shooting position on the line. I finally decided the powder was the problem and have switch over to WW231. Guess what? No unburned powder and a lot less smoke.

AA might meter like salt in a progressive loader but I don’t plan to use it again.
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Old September 20, 2006, 03:42 PM   #6
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Now that I think about it, it's probably the weak loads doing this. I was experimenting with various loads that would be on the verge of cycling/not cycling the slide on a stock Glock 19. I will try some medium powdered loads (4.0gr Acc #2 on 115gr TMJ) by themselves and see how it does.
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