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Old February 21, 2012, 12:22 AM   #1
ScottRiqui
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Join Date: January 27, 2010
Location: Norfolk, VA
Posts: 2,905
Soot/Carbon on Outside of Cases?

The ammo used was factory, not reloads (I'm still working on gathering up a sufficient quantity of .380 brass before I start reloading it), but I figure you guys probably spend more time examining your spent brass than those who don't reload, so I thought I'd ask here.

Most of my spent cases fired from my .380 have some carbon deposits on the outside of the case. Here's a picture of one of them (sorry for the cellphone pic, but I think it's clear enough.)



It appears that some of the hot gases from the burning powder are leaking back between the case and the chamber wall. I've seen this on other people's pistol brass as well from time to time, so I don't know if it's indicative of a problem, or just something that some guns do.

The gun used was a Beretta 84BB (about 25 years old, but very lightly used). The chamber and barrel look pristine - smooth with no visible pitting or deposits. The ammo was Winchester White Box, 95 gn FMJ.

Any insights would be greatly appreciated.
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