handgun brass - black on one side

pilgrim

pilgrim

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hello,

today picked up couple pcs of handgun brass, they were black on one side only...

what causes this? ammo quality? chamber defect? or?

thanks
K
 
Sure it was fired in a handgun? My Sub-2000 leaves 9mm brass pretty blackened, due to the blowback action.

EDIT: Just took a picture of a piece of brass fired in my Sub-2000 and it seems to be blackened more on one side than another, much like you describe.
DSCI0025.jpg

(sorry for the poor lighting)
 
1. handgun.....I fired them by myself - CZ75 SP-01 Shadow
2. shot in the TSE ans collected right away....so, no weather influence....
3. factory loads, so not sure if it`s a Titegroup :)
4. LOOKS EXACTLY like the brass on the picture in the post #5 (thanks for the picture, BTW)

K
 
Ahh the titegroup stain. Essays have been written on the subject, but I the Stevesummit has the write idea. A high density, low volume charge would sit on one side on the case and heat that side slightly more than the rest of the case. Not sure, but thats about the best description i've ever heard, not neccessarily tight group, but most likely a similar, high density, fast burning, hot burning powder
 
That's how my Bullseye loaded 45 acp brass looked like. Another shooter at my club has similar looking brass and he loads with Bullseye too.

Loaded with Universal, my 45 brass has never had those black burns.
 
looks like my gun is Ok, just a powder burn

thanks a lot guys

P.S.: the powder I will use in my reloads is the Titegroup, so I will see those burns a lot :)
 
The reason I have been told that this happens is because the load may not be hot enought to make the brass expand enought to seal all the way around the end or the case mouth. I tried it in a revolver by reducing the loads by 1/2 grains and my findings were that the lighter the load the worst this happens. My conclusion was that this was the most likely reason for the blacking of the case. Just my 2 cents worth.

Graydog
 
graydog said:
The reason I have been told that this happens is because the load may not be hot enought to make the brass expand enought to seal all the way around the end or the case mouth. I tried it in a revolver by reducing the loads by 1/2 grains and my findings were that the lighter the load the worst this happens. My conclusion was that this was the most likely reason for the blacking of the case. Just my 2 cents worth.

Graydog
Click to expand...


:agree:
 
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