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Author Topic: Dirty Cases  (Read 318 times)

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Offline vanbuzen9

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Dirty Cases
« on: May 18, 2005, 05:14:33 AM »
Hello,

I just got done reloading a batch of 9mm cases. For some reason, there was alot of black stuff on the outside of the cases.  I have heard that this could be caused by an under-powered load. (not expanding enough to seal the gases).  Using 100 grain hornady bullets on top of 5.7 grains power pistol.  Any suggestions or insite would be great.

thanks,
vanbuzen9
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Offline RickG

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Dirty Cases
« Reply #1 on: May 18, 2005, 10:33:18 AM »
VanB9

Check your crimp if it's not crimped enough the bullet leaves before the pressure builds and allows blowback.  You'll probably always have some "black stuff" on the case.

Rick
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Offline KN

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Dirty Cases
« Reply #2 on: May 18, 2005, 11:35:11 AM »
Incomplete ignition can cause this also. Such as using std primers with H110. Basically you are correct that the cases are not expanding enough.  KN
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